NeXus classes

Overview

NeXus provides a substantial number of base class definitions. At this point ScippNexus supports only a very limited number of these. Furthermore, not all features of each class definition are implemented. The class of a group is read from the group’s 'NX_class' attribute.

The following table gives an overview of the most important supported classes. There are roughly two categories of classes, those that contain data and can be read as a scipp.DataArray (for example NXdata), and those that mostly serve as groups for nested classes (for example NXentry containing NXdata):

NeXus class	read as	comment	NeXus specification
NXdata	scipp.DataArray	example below	link
NXdetector	scipp.DataGroup wrapping scipp.DataArray	example below	link
NXdisk_chopper	scipp.DataGroup		link
NXentry	scipp.DataGroup	generic group-like	link
NXevent_data	scipp.DataArray	example below	link
NXinstrument	scipp.DataGroup	generic group-like	link
NXlog	scipp.DataArray	example below	link
NXmonitor	scipp.DataGroup wrapping scipp.DataArray	example below	link
NXroot	scipp.DataGroup	generic group-like	link
NXsample	scipp.DataGroup		link
NXsource	scipp.DataGroup		link
NXtransformations	scipp.DataGroup	generic group-like	link

Any class that is not explicitly supported will be loaded as a scipp.DataGroup as well.

For the examples below we use a file from the ScippNexus sample data:

from scippnexus import data

filename = data.get_path('PG3_4844_event.nxs')
import scippnexus as snx

f = snx.File(filename)

Downloading file 'PG3_4844_event.nxs' from 'https://public.esss.dk/groups/scipp/scippnexus/1/PG3_4844_event.nxs' to '/home/runner/.cache/scippnexus/1'.

Base class: NXobject

Base of all other NeXus classes. Provides a generic group-like interface. That is, this is equivalent to a dictionary of fields and/or other groups.

NeXus classes that group other information but cannot be read as a data array provide this interface. Such groups will be loaded as scipp.DataGroup when loaded:

tree = f['entry/instrument'][()]
tree

/home/runner/work/scippnexus/scippnexus/.tox/docs/lib/python3.9/site-packages/scippnexus/base.py:410: UserWarning: Failed to load /entry/instrument/bank184 as NXevent_data: Invalid index in NXevent_data at /entry/instrument/bank184/event_index:
Bin indices out of range Falling back to loading HDF5 group children as scipp.DataGroup.
  self._warn_fallback(e)

/home/runner/work/scippnexus/scippnexus/.tox/docs/lib/python3.9/site-packages/scippnexus/base.py:410: UserWarning: Failed to load /entry/instrument/bank82 as NXevent_data: Invalid index in NXevent_data at /entry/instrument/bank82/event_index:
Bin begin index must be less or equal to its end index. Falling back to loading HDF5 group children as scipp.DataGroup.
  self._warn_fallback(e)
/home/runner/work/scippnexus/scippnexus/.tox/docs/lib/python3.9/site-packages/scippnexus/base.py:410: UserWarning: Failed to load /entry/instrument/bank84 as NXevent_data: Invalid index in NXevent_data at /entry/instrument/bank84/event_index:
Bin begin index must be less or equal to its end index. Falling back to loading HDF5 group children as scipp.DataGroup.
  self._warn_fallback(e)

scipp.DataGroup

(dim_0: None, x_pixel_offset: 154, y_pixel_offset: 7, event_time_zero: 330473, event: None)

• HI

  scipp

  DataGroup

  (dim_0: None)

  • azimuthal_angle

    scipp

    Variable

    ()

    float32

    rad

    0.0
  • bend_angle_x

    scipp

    Variable

    ()

    string

    deg

    0
  • bend_angle_y

    scipp

    Variable

    ()

    string

    deg

    0
  • coating_material

    str

    ()

    Ni/Ti
  • distance

    scipp

    Variable

    ()

    float32

    m

    -54.5
  • external_material

    str

    ()

    stainless steel
  • guide

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.784000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
  • interior_atmosphere

    str

    ()

    vacuum
  • m_value

    str

    ()

    2.0
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        1.0, 0.0, ..., 1.0, 0.0
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.014, 0.0515, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.0, 0.0, -54.5
  • polar_angle

    scipp

    Variable

    ()

    float32

    rad

    3.1415927
  • substrate_material

    str

    ()

    borofloat glass
  • substrate_thickness_max

    scipp

    Variable

    ()

    string

    mm

    11
  • substrate_thickness_min

    scipp

    Variable

    ()

    string

    mm

    9
  • vGuide

    scipp

    DataGroup

    ()

    • average_value

      float32

      ()

      2.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      float32

      ()

      2.0
    • maximum_value

      float32

      ()

      2.0
    • minimum_value

      float32

      ()

      2.0
    • requested_value

      scipp

      Variable

      ()

      float32

      N

      2.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      float32

      ()

      2.0
  • x_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
  • y_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
• HR

  scipp

  DataGroup

  (dim_0: None)

  • azimuthal_angle

    scipp

    Variable

    ()

    float32

    rad

    0.0
  • bend_angle_x

    scipp

    Variable

    ()

    string

    deg

    0
  • bend_angle_y

    scipp

    Variable

    ()

    string

    deg

    0
  • coating_material

    str

    ()

    Ni/Ti
  • distance

    scipp

    Variable

    ()

    float32

    m

    -54.5
  • external_material

    str

    ()

    stainless steel
  • guide

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.784000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      -55.463
  • interior_atmosphere

    str

    ()

    vacuum
  • m_value

    str

    ()

    0.0
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        1.0, 0.0, ..., 1.0, 0.0
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.014, 0.0515, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.0, 0.0, -54.5
  • polar_angle

    scipp

    Variable

    ()

    float32

    rad

    3.1415927
  • substrate_material

    str

    ()

    borofloat glass
  • substrate_thickness_max

    scipp

    Variable

    ()

    string

    mm

    11
  • substrate_thickness_min

    scipp

    Variable

    ()

    string

    mm

    9
  • vGuide

    scipp

    DataGroup

    ()

    • average_value

      float32

      ()

      2.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      float32

      ()

      2.0
    • maximum_value

      float32

      ()

      2.0
    • minimum_value

      float32

      ()

      2.0
    • requested_value

      scipp

      Variable

      ()

      float32

      N

      2.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      float32

      ()

      2.0
  • x_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
  • y_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
• SNS

  scipp

  DataGroup

  ()

  • frequency

    scipp

    Variable

    ()

    float32

    Hz

    60.0
  • name

    str

    ()

    Spallation Neutron Source
  • probe

    str

    ()

    neutron
  • type

    str

    ()

    Spallation Neutron Source
• SNSdetector_calibration_id

  str

  ()

  139
• SNSgeometry_file_name

  str

  ()

  PG3_geom_2011_02_25.xml
• SNSnxtranslate

  str

  ()

  0.3.0
• SNStranslation_service

  str

  ()

  3.2.3
• aperture1

  scipp

  DataGroup

  (dim_0: None)

  • S1HCenter

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      0.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      0.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      0.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      0.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      0.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      0.0
  • S1HCenterOffset

    scipp

    DataGroup

    ()

    • average_value

      float32

      ()

      0.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      float32

      ()

      0.0
    • maximum_value

      float32

      ()

      0.0
    • minimum_value

      float32

      ()

      0.0
    • requested_value

      scipp

      Variable

      ()

      float32

      N

      0.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      float32

      ()

      0.0
  • S1HWidth

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      10.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      10.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      10.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      10.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      10.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      10.0
  • S1VCenter

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      5.0
  • S1VCenterOffset

    scipp

    DataGroup

    ()

    • average_value

      float32

      ()

      0.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      float32

      ()

      0.0
    • maximum_value

      float32

      ()

      0.0
    • minimum_value

      float32

      ()

      0.0
    • requested_value

      scipp

      Variable

      ()

      float32

      N

      0.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      float32

      ()

      0.0
  • S1VHeight

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      30.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      30.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      30.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      30.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      30.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.816000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      30.0
  • azimuthal_angle

    scipp

    Variable

    ()

    float32

    rad

    0.0
  • distance

    scipp

    Variable

    ()

    float32

    m

    -1.0
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        1.0, 0.0, ..., 1.0, 0.0
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.01, 0.03, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.0, 0.0, -1.0
  • polar_angle

    scipp

    Variable

    ()

    float32

    rad

    3.1415927
  • s1b

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      20.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      20.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      20.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      20.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      20.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.784000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      20.0
  • s1l

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      5.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.800000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      5.0
  • s1r

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.784000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      -5.0
  • s1t

    scipp

    DataGroup

    ()

    • average_value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
    • duration

      scipp

      Variable

      ()

      float32

      s

      0.0
    • effective_value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
    • maximum_value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
    • minimum_value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
    • requested_value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
    • time

      scipp

      Variable

      ()

      datetime64

      ns

      2011-08-12T15:50:16.784000000
    • value

      scipp

      Variable

      ()

      float32

      mm

      -10.0
  • x_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
  • y_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
• bank102

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    F2
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.07520324, 0.0008634576, ..., 0.95087516, -0.024099652
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.2050142, -0.8542655, 0.67503774
  • total_counts

    int32

    ()

    456601
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank103

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    F3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.07206946, 0.0019221402, ..., 0.9885856, -0.012752413
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.3054664, -0.42925474, 0.66754323
  • total_counts

    int32

    ()

    484446
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank104

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    F4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.07762421, 0.0025745311, ..., 0.9999957, -0.0026736327
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.3375163, 0.007599, 0.6648235
  • total_counts

    int32

    ()

    465038
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank105

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    F5
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.074737966, 0.0007595541, ..., 0.9876911, 0.010942041
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.3034072, 0.44297725, 0.6675825
  • total_counts

    int32

    ()

    597687
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank106

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    F6
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.07553149, -0.0007277964, ..., 0.95065147, 0.02412432
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.2015195, 0.86776173, 0.67536724
  • total_counts

    int32

    ()

    619400
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank123

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    G3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.12487066, -0.005911149, ..., 0.9997881, 0.008326013
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.1319537, -0.41684926, 1.4719385
  • total_counts

    int32

    ()

    835910
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank124

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    G4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.11986005, -0.005193665, ..., 0.99983066, 0.0030392138
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.1185687, -0.0002555, 1.470097
  • total_counts

    int32

    ()

    719846
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank143

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    H3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.34058982, -0.007132651, ..., 0.99986297, 0.0016174228
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.9351792, -0.41630125, 2.2435923
  • total_counts

    int32

    ()

    605641
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank144

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    H4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.3371856, -0.005633195, ..., 0.9998946, 0.0007914557
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.9297032, -0.00782325, 2.243953
  • total_counts

    int32

    ()

    719502
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank164

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    I4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.52433485, -0.0075674476, ..., 0.9999132, 0.0120967375
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.5749183, -0.0123765, 2.939976
  • total_counts

    int32

    ()

    619712
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank184

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7,
   event_time_zero: 330473,
   event: 513380)

  • local_name

    str

    ()

    J4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        -0.68827075, 0.0023438812, ..., 0.99987054, -0.012655793
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.078632, -0.0137955, 3.5672722
  • total_counts

    int32

    ()

    513380
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataGroup

    (event_time_zero: 330473,
     event: 513380)

    • event_time_zero

      scipp

      Variable

      (event_time_zero: 330473)

      datetime64

      ns

      2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781
    • event_index

      scipp

      Variable

      (event_time_zero: 330473)

      int64

      0, 0, ..., 9223372036854775807, 9223372036854775807
    • event_time_offset

      scipp

      Variable

      (event: 513380)

      float32

      µs

      5906.3, 6189.3, ..., 10358.8, 11654.9
    • event_id

      scipp

      Variable

      (event: 513380)

      int32

      230254, 231027, ..., 230834, 230571
• bank22

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    B2
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.91311646, -0.0018039594, ..., 0.9504342, -0.2832085
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        1.544676, -0.8569665, -1.9281462
  • total_counts

    int32

    ()

    1383144
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank23

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    B3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.91298234, -0.0015865297, ..., 0.98713416, -0.14533475
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        1.586625, -0.43086874, -2.0230145
  • total_counts

    int32

    ()

    1003546
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank24

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    B4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.912612, -4.732385e-05, ..., 0.99999857, 0.0015598646
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        1.599787, 0.004278, -2.0524123
  • total_counts

    int32

    ()

    1123324
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank42

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    C2
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.7532727, -0.0017466473, ..., 0.94824696, -0.2380973
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.1918738, -0.84933674, -1.435612
  • total_counts

    int32

    ()

    991345
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank43

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    C3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.7523526, -0.0001120215, ..., 0.9868775, -0.12141007
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.2594852, -0.4253265, -1.5125445
  • total_counts

    int32

    ()

    1050733
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank44

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    C4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.7523935, -0.0016688275, ..., 0.99998444, -0.0029054708
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.283286, 0.011741, -1.5391445
  • total_counts

    int32

    ()

    933319
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank62

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    D2
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.5424301, 0.0032140214, ..., 0.9512337, -0.16988519
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.712514, -0.8528865, -0.8270292
  • total_counts

    int32

    ()

    1145925
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank63

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    D3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.54071504, -0.0031628278, ..., 0.9870752, -0.084011525
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.7984772, -0.4272105, -0.8828877
  • total_counts

    int32

    ()

    602001
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank64

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    D4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.54180133, -0.0009649804, ..., 0.9999995, 0.0009414952
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        2.828899, 0.00748275, -0.9024227
  • total_counts

    int32

    ()

    1123669
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank82

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7,
   event_time_zero: 330473,
   event: 663792)

  • local_name

    str

    ()

    E2
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.30577186, 0.0016155625, ..., 0.9530574, -0.09404948
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.0537205, -0.8558485, -0.10468375
  • total_counts

    int32

    ()

    663792
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataGroup

    (event_time_zero: 330473,
     event: 663792)

    • event_time_zero

      scipp

      Variable

      (event_time_zero: 330473)

      datetime64

      ns

      2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781
    • event_index

      scipp

      Variable

      (event_time_zero: 330473)

      int64

      0, 0, ..., 663790, 9223372036854775807
    • event_time_offset

      scipp

      Variable

      (event: 663792)

      float32

      µs

      8883.5, 9103.0, ..., 7131.6, 7331.1
    • event_id

      scipp

      Variable

      (event: 663792)

      int32

      102537, 102886, ..., 102960, 102948
• bank83

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7)

  • local_name

    str

    ()

    E3
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.30549735, -0.002963881, ..., 0.9888769, -0.04263911
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.1493595, -0.42939225, -0.13501576
  • total_counts

    int32

    ()

    644580
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    DataArrayView

    binned data [len=0, len=0, ..., len=0, len=0]
• bank84

  scipp

  DataGroup

  (dim_0: None,
   x_pixel_offset: 154,
   y_pixel_offset: 7,
   event_time_zero: 330473,
   event: 624439)

  • local_name

    str

    ()

    E4
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        0.30450308, -0.0036800236, ..., 0.99995583, 0.006138266
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.77, 0.3801, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        3.1805677, 0.00451375, -0.146255
  • total_counts

    int32

    ()

    624439
  • data_x_y

    scipp

    DataArray

    (x_pixel_offset: 154,
     y_pixel_offset: 7)

    int32

    0, 0, ..., 0, 0
  • events

    scipp

    DataGroup

    (event_time_zero: 330473,
     event: 624439)

    • event_time_zero

      scipp

      Variable

      (event_time_zero: 330473)

      datetime64

      ns

      2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781
    • event_index

      scipp

      Variable

      (event_time_zero: 330473)

      int64

      0, 0, ..., 624438, 9223372036854775807
    • event_time_offset

      scipp

      Variable

      (event: 624439)

      float32

      µs

      8164.1, 4931.2, ..., 6524.7, 14206.1
    • event_id

      scipp

      Variable

      (event: 624439)

      int32

      105088, 105821, ..., 105403, 105275
• beamline

  str

  ()

  11A
• chopper1

  scipp

  DataGroup

  ()

  • distance

    scipp

    Variable

    ()

    float64

    m

    6.647418
• chopper2

  scipp

  DataGroup

  ()

  • distance

    scipp

    Variable

    ()

    float64

    m

    7.899603
• chopper3

  scipp

  DataGroup

  ()

  • distance

    scipp

    Variable

    ()

    float64

    m

    49.975666
• moderator

  scipp

  DataGroup

  ()

  • distance

    scipp

    Variable

    ()

    float32

    m

    -60.0
  • poison_depth

    scipp

    Variable

    ()

    float32

    cm

    2.5
  • poison_material

    str

    ()

    Gd
  • temperature

    scipp

    Variable

    ()

    float32

    K

    20.0
  • type

    str

    ()

    H2, supercritical
• name

  str

  ()

  POWGEN
• section1

  scipp

  DataGroup

  (dim_0: None)

  • azimuthal_angle

    scipp

    Variable

    ()

    float32

    rad

    0.0
  • bend_angle_x

    scipp

    Variable

    ()

    string

    deg

    0
  • bend_angle_y

    scipp

    Variable

    ()

    string

    deg

    0
  • coating_material

    str

    ()

    Ni/Ti
  • distance

    scipp

    Variable

    ()

    float32

    m

    -25.5
  • external_material

    str

    ()

    stainless steel
  • interior_atmosphere

    str

    ()

    vacuum
  • m_value

    str

    ()

    2.0
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        1.0, 0.0, ..., 1.0, 0.0
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.014, 0.086, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.0, 0.0, -25.5
  • polar_angle

    scipp

    Variable

    ()

    float32

    rad

    3.1415927
  • substrate_material

    str

    ()

    borofloat glass
  • substrate_thickness_max

    scipp

    Variable

    ()

    string

    mm

    11
  • substrate_thickness_min

    scipp

    Variable

    ()

    string

    mm

    9
  • x_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
  • y_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
• section2

  scipp

  DataGroup

  (dim_0: None)

  • azimuthal_angle

    scipp

    Variable

    ()

    float32

    rad

    0.0
  • bend_angle_x

    scipp

    Variable

    ()

    string

    deg

    0
  • bend_angle_y

    scipp

    Variable

    ()

    string

    deg

    0
  • coating_material

    str

    ()

    Ni/Ti
  • distance

    scipp

    Variable

    ()

    float32

    m

    -47.5
  • external_material

    str

    ()

    stainless steel
  • interior_atmosphere

    str

    ()

    vacuum
  • m_value

    str

    ()

    2.0
  • origin

    scipp

    DataGroup

    (dim_0: None)

    • orientation

      scipp

      DataGroup

      (dim_0: 6)

      • value

        scipp

        Variable

        (dim_0: 6)

        float32

        1.0, 0.0, ..., 1.0, 0.0
    • shape

      scipp

      DataGroup

      (dim_0: 3)

      • description

        str

        ()

        x,y,z
      • shape

        str

        ()

        nxbox
      • size

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.014, 0.0725, nan
    • translation

      scipp

      DataGroup

      (dim_0: 3)

      • distance

        scipp

        Variable

        (dim_0: 3)

        float32

        m

        0.0, 0.0, -47.5
  • polar_angle

    scipp

    Variable

    ()

    float32

    rad

    3.1415927
  • substrate_material

    str

    ()

    borofloat glass
  • substrate_thickness_max

    scipp

    Variable

    ()

    string

    mm

    11
  • substrate_thickness_min

    scipp

    Variable

    ()

    string

    mm

    9
  • x_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0
  • y_pixel_offset

    scipp

    Variable

    ()

    float32

    m

    0.0

NXdata

Provides multi-dimensional labeled data. See the NeXus format NXdata base class definition for details. Can be read as a data array using positional indexing.

Example:

data = f['entry/bank103']
data

<scippnexus.base.Group at 0x7fee77f5fb50>

data['x_pixel_offset', :10]

scipp.DataArray (1.59 KB)

• Dimensions:
  • x_pixel_offset: 10
  • y_pixel_offset: 7
• Coordinates: (2)
  • x_pixel_offset
    (x_pixel_offset)
    float32
    m
    -0.3825, -0.3775, ..., -0.3425, -0.3375

    Values:
    array([-0.3825, -0.3775, -0.3725, -0.3675, -0.3625, -0.3575, -0.3525,
           -0.3475, -0.3425, -0.3375], dtype=float32)

  • y_pixel_offset
    (y_pixel_offset)
    float32
    m
    -0.1629, -0.1086, ..., 0.1086, 0.1629

    Values:
    array([-0.1629, -0.1086, -0.0543,  0.    ,  0.0543,  0.1086,  0.1629],
          dtype=float32)

• Data: (1)
  • (x_pixel_offset, y_pixel_offset)
    int32
    0, 0, ..., 0, 0

    Values:
    array([[0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0],
           [0, 0, 0, 0, 0, 0, 0]], dtype=int32)

NXdetector

Provides data for a detector. See the NeXus format NXdetector base class definition for details. NXdetector contains data and coords similar to NXdata as well as additional fields that are not readily inserted into a scipp.DataArray. Therefore, NXdetector can be read as a scipp.DataGroup wrapping a scipp.DataArray using positional indexing. The “signal” field and associated coordinates are combined into a scipp.DataArray and the remaining fields are added as fields to the scipp.DataGroup. In the output, the scipp.DataArray has the same name as the “signal” dataset in the NeXus file. The underlying data may be dense data or event data.

Example:

detector = f['entry/instrument/bank102']
detector

<scippnexus.base.Group at 0x7fee77f5f7c0>

det = detector[...]
det

scipp.DataGroup

(dim_0: None, x_pixel_offset: 154, y_pixel_offset: 7)

• local_name

  str

  ()

  F2
• origin

  scipp

  DataGroup

  (dim_0: None)

  • orientation

    scipp

    DataGroup

    (dim_0: 6)

    • value

      scipp

      Variable

      (dim_0: 6)

      float32

      0.07520324, 0.0008634576, ..., 0.95087516, -0.024099652
  • shape

    scipp

    DataGroup

    (dim_0: 3)

    • description

      str

      ()

      x,y,z
    • shape

      str

      ()

      nxbox
    • size

      scipp

      Variable

      (dim_0: 3)

      float32

      m

      0.77, 0.3801, nan
  • translation

    scipp

    DataGroup

    (dim_0: 3)

    • distance

      scipp

      Variable

      (dim_0: 3)

      float32

      m

      3.2050142, -0.8542655, 0.67503774
• total_counts

  int32

  ()

  456601
• data_x_y

  scipp

  DataArray

  (x_pixel_offset: 154,
   y_pixel_offset: 7)

  int32

  0, 0, ..., 0, 0
• events

  scipp

  DataArray

  (x_pixel_offset: 154,
   y_pixel_offset: 7)

  DataArrayView

  binned data [len=0, len=0, ..., len=0, len=0]

In this example both dense data (“data_x”) and event data (“events”) are present:

det['data_x_y']

scipp.DataArray (23.94 KB)

• Dimensions:
  • x_pixel_offset: 154
  • y_pixel_offset: 7
• Coordinates: (6)
  • azimuthal_angle
    (x_pixel_offset, y_pixel_offset)
    float32
    rad
    -0.3123652, -0.2958419, ..., -0.22583345, -0.20972791

    Values:
    array([[-0.3123652 , -0.2958419 , -0.27932844, ..., -0.24636689,
            -0.22993654, -0.21355148],
           [-0.3123288 , -0.2958073 , -0.27929565, ..., -0.24633776,
            -0.22990927, -0.21352607],
           [-0.31229237, -0.29577267, -0.27926287, ..., -0.24630865,
            -0.229882  , -0.21350066],
           ...,
           [-0.30695337, -0.29069847, -0.2744558 , ..., -0.24204123,
            -0.2258862 , -0.20977707],
           [-0.3069181 , -0.29066497, -0.27442405, ..., -0.24201305,
            -0.22585982, -0.20975249],
           [-0.3068829 , -0.29063147, -0.27439234, ..., -0.24198489,
            -0.22583345, -0.20972791]], dtype=float32)

  • distance
    (x_pixel_offset, y_pixel_offset)
    float32
    m
    3.2983806, 3.2987897, ..., 3.5141585, 3.518735

    Values:
    array([[3.2983806, 3.2987897, 3.3000927, ..., 3.305374 , 3.3093479,
            3.314207 ],
           [3.299189 , 3.2995982, 3.3009007, ..., 3.3061805, 3.3101537,
            3.3150117],
           [3.300005 , 3.300414 , 3.301716 , ..., 3.3069947, 3.310967 ,
            3.3158238],
           ...,
           [3.500146 , 3.5005317, 3.5017593, ..., 3.506737 , 3.510483 ,
            3.5150642],
           [3.501986 , 3.5023715, 3.5035987, ..., 3.5085735, 3.5123177,
            3.5168965],
           [3.5038323, 3.5042174, 3.505444 , ..., 3.5104163, 3.5141585,
            3.518735 ]], dtype=float32)

  • pixel_id
    (x_pixel_offset, y_pixel_offset)
    int32
    127500, 127501, ..., 128576, 128577

    Values:
    array([[127500, 127501, 127502, ..., 127504, 127505, 127506],
           [127507, 127508, 127509, ..., 127511, 127512, 127513],
           [127514, 127515, 127516, ..., 127518, 127519, 127520],
           ...,
           [128557, 128558, 128559, ..., 128561, 128562, 128563],
           [128564, 128565, 128566, ..., 128568, 128569, 128570],
           [128571, 128572, 128573, ..., 128575, 128576, 128577]], dtype=int32)

  • polar_angle
    (x_pixel_offset, y_pixel_offset)
    float32
    rad
    1.4804635, 1.4808731, ..., 1.266226, 1.2670246

    Values:
    array([[1.4804635, 1.4808731, 1.4813068, ..., 1.4822451, 1.4827487,
            1.4832746],
           [1.4789683, 1.4793779, 1.4798121, ..., 1.4807527, 1.481258 ,
            1.4817859],
           [1.4774736, 1.4778835, 1.4783182, ..., 1.479261 , 1.479768 ,
            1.480298 ],
           ...,
           [1.2659944, 1.266421 , 1.2669227, ..., 1.2681499, 1.2688735,
            1.2696692],
           [1.2646669, 1.2650936, 1.2655957, ..., 1.2668242, 1.267549 ,
            1.2683462],
           [1.2633408, 1.2637675, 1.2642701, ..., 1.2655001, 1.266226 ,
            1.2670246]], dtype=float32)

  • x_pixel_offset
    (x_pixel_offset)
    float32
    m
    -0.3825, -0.3775, ..., 0.3775, 0.3825

    Values:
    array([-0.3825, -0.3775, -0.3725, -0.3675, -0.3625, -0.3575, -0.3525,
           -0.3475, -0.3425, -0.3375, -0.3325, -0.3275, -0.3225, -0.3175,
           -0.3125, -0.3075, -0.3025, -0.2975, -0.2925, -0.2875, -0.2825,
           -0.2775, -0.2725, -0.2675, -0.2625, -0.2575, -0.2525, -0.2475,
           -0.2425, -0.2375, -0.2325, -0.2275, -0.2225, -0.2175, -0.2125,
           -0.2075, -0.2025, -0.1975, -0.1925, -0.1875, -0.1825, -0.1775,
           -0.1725, -0.1675, -0.1625, -0.1575, -0.1525, -0.1475, -0.1425,
           -0.1375, -0.1325, -0.1275, -0.1225, -0.1175, -0.1125, -0.1075,
           -0.1025, -0.0975, -0.0925, -0.0875, -0.0825, -0.0775, -0.0725,
           -0.0675, -0.0625, -0.0575, -0.0525, -0.0475, -0.0425, -0.0375,
           -0.0325, -0.0275, -0.0225, -0.0175, -0.0125, -0.0075, -0.0025,
            0.0025,  0.0075,  0.0125,  0.0175,  0.0225,  0.0275,  0.0325,
            0.0375,  0.0425,  0.0475,  0.0525,  0.0575,  0.0625,  0.0675,
            0.0725,  0.0775,  0.0825,  0.0875,  0.0925,  0.0975,  0.1025,
            0.1075,  0.1125,  0.1175,  0.1225,  0.1275,  0.1325,  0.1375,
            0.1425,  0.1475,  0.1525,  0.1575,  0.1625,  0.1675,  0.1725,
            0.1775,  0.1825,  0.1875,  0.1925,  0.1975,  0.2025,  0.2075,
            0.2125,  0.2175,  0.2225,  0.2275,  0.2325,  0.2375,  0.2425,
            0.2475,  0.2525,  0.2575,  0.2625,  0.2675,  0.2725,  0.2775,
            0.2825,  0.2875,  0.2925,  0.2975,  0.3025,  0.3075,  0.3125,
            0.3175,  0.3225,  0.3275,  0.3325,  0.3375,  0.3425,  0.3475,
            0.3525,  0.3575,  0.3625,  0.3675,  0.3725,  0.3775,  0.3825],
          dtype=float32)

  • y_pixel_offset
    (y_pixel_offset)
    float32
    m
    -0.1629, -0.1086, ..., 0.1086, 0.1629

    Values:
    array([-0.1629, -0.1086, -0.0543,  0.    ,  0.0543,  0.1086,  0.1629],
          dtype=float32)

• Data: (1)
  • (x_pixel_offset, y_pixel_offset)
    int32
    0, 0, ..., 0, 0

    Values:
    array([[  0,   0,   0, ...,   0,   0,   0],
           [340, 259, 191, ..., 118, 110,  94],
           [464, 527, 401, ..., 193, 160, 151],
           ...,
           [  0,   0,   0, ...,   0,   0,   0],
           [  0,   0,   0, ...,   0,   0,   0],
           [  0,   0,   0, ...,   0,   0,   0]], dtype=int32)

det['events']

scipp.DataArray (7.00 MB)

• Dimensions:
  • x_pixel_offset: 154
  • y_pixel_offset: 7
• Coordinates: (6)
  • azimuthal_angle
    (x_pixel_offset, y_pixel_offset)
    float32
    rad
    -0.3123652, -0.2958419, ..., -0.22583345, -0.20972791

    Values:
    array([[-0.3123652 , -0.2958419 , -0.27932844, ..., -0.24636689,
            -0.22993654, -0.21355148],
           [-0.3123288 , -0.2958073 , -0.27929565, ..., -0.24633776,
            -0.22990927, -0.21352607],
           [-0.31229237, -0.29577267, -0.27926287, ..., -0.24630865,
            -0.229882  , -0.21350066],
           ...,
           [-0.30695337, -0.29069847, -0.2744558 , ..., -0.24204123,
            -0.2258862 , -0.20977707],
           [-0.3069181 , -0.29066497, -0.27442405, ..., -0.24201305,
            -0.22585982, -0.20975249],
           [-0.3068829 , -0.29063147, -0.27439234, ..., -0.24198489,
            -0.22583345, -0.20972791]], dtype=float32)

  • distance
    (x_pixel_offset, y_pixel_offset)
    float32
    m
    3.2983806, 3.2987897, ..., 3.5141585, 3.518735

    Values:
    array([[3.2983806, 3.2987897, 3.3000927, ..., 3.305374 , 3.3093479,
            3.314207 ],
           [3.299189 , 3.2995982, 3.3009007, ..., 3.3061805, 3.3101537,
            3.3150117],
           [3.300005 , 3.300414 , 3.301716 , ..., 3.3069947, 3.310967 ,
            3.3158238],
           ...,
           [3.500146 , 3.5005317, 3.5017593, ..., 3.506737 , 3.510483 ,
            3.5150642],
           [3.501986 , 3.5023715, 3.5035987, ..., 3.5085735, 3.5123177,
            3.5168965],
           [3.5038323, 3.5042174, 3.505444 , ..., 3.5104163, 3.5141585,
            3.518735 ]], dtype=float32)

  • pixel_id
    (x_pixel_offset, y_pixel_offset)
    int32
    127500, 127501, ..., 128576, 128577

    Values:
    array([[127500, 127501, 127502, ..., 127504, 127505, 127506],
           [127507, 127508, 127509, ..., 127511, 127512, 127513],
           [127514, 127515, 127516, ..., 127518, 127519, 127520],
           ...,
           [128557, 128558, 128559, ..., 128561, 128562, 128563],
           [128564, 128565, 128566, ..., 128568, 128569, 128570],
           [128571, 128572, 128573, ..., 128575, 128576, 128577]], dtype=int32)

  • polar_angle
    (x_pixel_offset, y_pixel_offset)
    float32
    rad
    1.4804635, 1.4808731, ..., 1.266226, 1.2670246

    Values:
    array([[1.4804635, 1.4808731, 1.4813068, ..., 1.4822451, 1.4827487,
            1.4832746],
           [1.4789683, 1.4793779, 1.4798121, ..., 1.4807527, 1.481258 ,
            1.4817859],
           [1.4774736, 1.4778835, 1.4783182, ..., 1.479261 , 1.479768 ,
            1.480298 ],
           ...,
           [1.2659944, 1.266421 , 1.2669227, ..., 1.2681499, 1.2688735,
            1.2696692],
           [1.2646669, 1.2650936, 1.2655957, ..., 1.2668242, 1.267549 ,
            1.2683462],
           [1.2633408, 1.2637675, 1.2642701, ..., 1.2655001, 1.266226 ,
            1.2670246]], dtype=float32)

  • x_pixel_offset
    (x_pixel_offset)
    float32
    m
    -0.3825, -0.3775, ..., 0.3775, 0.3825

    Values:
    array([-0.3825, -0.3775, -0.3725, -0.3675, -0.3625, -0.3575, -0.3525,
           -0.3475, -0.3425, -0.3375, -0.3325, -0.3275, -0.3225, -0.3175,
           -0.3125, -0.3075, -0.3025, -0.2975, -0.2925, -0.2875, -0.2825,
           -0.2775, -0.2725, -0.2675, -0.2625, -0.2575, -0.2525, -0.2475,
           -0.2425, -0.2375, -0.2325, -0.2275, -0.2225, -0.2175, -0.2125,
           -0.2075, -0.2025, -0.1975, -0.1925, -0.1875, -0.1825, -0.1775,
           -0.1725, -0.1675, -0.1625, -0.1575, -0.1525, -0.1475, -0.1425,
           -0.1375, -0.1325, -0.1275, -0.1225, -0.1175, -0.1125, -0.1075,
           -0.1025, -0.0975, -0.0925, -0.0875, -0.0825, -0.0775, -0.0725,
           -0.0675, -0.0625, -0.0575, -0.0525, -0.0475, -0.0425, -0.0375,
           -0.0325, -0.0275, -0.0225, -0.0175, -0.0125, -0.0075, -0.0025,
            0.0025,  0.0075,  0.0125,  0.0175,  0.0225,  0.0275,  0.0325,
            0.0375,  0.0425,  0.0475,  0.0525,  0.0575,  0.0625,  0.0675,
            0.0725,  0.0775,  0.0825,  0.0875,  0.0925,  0.0975,  0.1025,
            0.1075,  0.1125,  0.1175,  0.1225,  0.1275,  0.1325,  0.1375,
            0.1425,  0.1475,  0.1525,  0.1575,  0.1625,  0.1675,  0.1725,
            0.1775,  0.1825,  0.1875,  0.1925,  0.1975,  0.2025,  0.2075,
            0.2125,  0.2175,  0.2225,  0.2275,  0.2325,  0.2375,  0.2425,
            0.2475,  0.2525,  0.2575,  0.2625,  0.2675,  0.2725,  0.2775,
            0.2825,  0.2875,  0.2925,  0.2975,  0.3025,  0.3075,  0.3125,
            0.3175,  0.3225,  0.3275,  0.3325,  0.3375,  0.3425,  0.3475,
            0.3525,  0.3575,  0.3625,  0.3675,  0.3725,  0.3775,  0.3825],
          dtype=float32)

  • y_pixel_offset
    (y_pixel_offset)
    float32
    m
    -0.1629, -0.1086, ..., 0.1086, 0.1629

    Values:
    array([-0.1629, -0.1086, -0.0543,  0.    ,  0.0543,  0.1086,  0.1629],
          dtype=float32)

• Data: (1)
  • (x_pixel_offset, y_pixel_offset)
    DataArrayView
    binned data [len=0, len=0, ..., len=0, len=0]

    dim='event',
    content=DataArray(
              dims=(event: 456601),
              data=float32[counts],
              coords={'event_time_offset':float32[µs], 'event_time_zero':datetime64[ns]})

If the underlying data is event data, the underlying event data can be selected using the special event_time_zero dimension. This dimension is present in the underlying NXevent_data group, but not preserved after loading and binning by pixels due to the prohibitive size. For example, we can select the first 1000 pulses and load data for all pixels:

detector['event_time_zero', :1000]

scipp.DataGroup

(dim_0: None, x_pixel_offset: 154, y_pixel_offset: 7)

• local_name

  str

  ()

  F2
• origin

  scipp

  DataGroup

  (dim_0: None)

  • orientation

    scipp

    DataGroup

    (dim_0: 6)

    • value

      scipp

      Variable

      (dim_0: 6)

      float32

      0.07520324, 0.0008634576, ..., 0.95087516, -0.024099652
  • shape

    scipp

    DataGroup

    (dim_0: 3)

    • description

      str

      ()

      x,y,z
    • shape

      str

      ()

      nxbox
    • size

      scipp

      Variable

      (dim_0: 3)

      float32

      m

      0.77, 0.3801, nan
  • translation

    scipp

    DataGroup

    (dim_0: 3)

    • distance

      scipp

      Variable

      (dim_0: 3)

      float32

      m

      3.2050142, -0.8542655, 0.67503774
• total_counts

  int32

  ()

  456601
• data_x_y

  scipp

  DataArray

  (x_pixel_offset: 154,
   y_pixel_offset: 7)

  int32

  0, 0, ..., 0, 0
• events

  scipp

  DataArray

  (x_pixel_offset: 154,
   y_pixel_offset: 7)

  DataArrayView

  binned data [len=0, len=0, ..., len=0, len=0]

Note:

Selecting a range of events allows for loading only a potentially very small section of the underlying event data and can thus be very fast.

In contrast, e.g., selecting a small range of pixels in presence of underlying event data is not fast, since the events for all pixels are stored in the order as they arrive in the acquisition system and the entire NXevent_data group must be loaded.

NXevent_data

Provides event data in raw format as produced by the acquisition system, i.e., not grouped into detector pixels. See the NeXus format NXevent_data base class definition for details. Can be read as a data array using slicing syntax.

Example:

event_data = f['entry/bank102_events']
event_data[...]

scipp.DataArray (12.79 MB)

• Dimensions:
  • event_time_zero: 330473
• Coordinates: (1)
  • event_time_zero
    (event_time_zero)
    datetime64
    ns
    2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781

    Values:
    array(['2011-08-12T15:50:17.000000000', '2011-08-12T15:50:17.016659999',
           '2011-08-12T15:50:17.033321000', ...,
           '2011-08-12T17:22:05.068359375', '2011-08-12T17:22:05.085449218',
           '2011-08-12T17:22:05.102050781'], dtype='datetime64[ns]')

• Data: (1)
  • (event_time_zero)
    DataArrayView
    binned data [len=0, len=3, ..., len=3, len=2]

    dim='event',
    content=DataArray(
              dims=(event: 456601),
              data=float32[counts],
              coords={'event_time_offset':float32[µs], 'event_id':int32})

In some cases the event data fields may be contained directly within an NXdetector. The event data can also be accessed from there:

f['entry/instrument/bank102']['events'][...]

scipp.DataArray (12.79 MB)

• Dimensions:
  • event_time_zero: 330473
• Coordinates: (1)
  • event_time_zero
    (event_time_zero)
    datetime64
    ns
    2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781

    Values:
    array(['2011-08-12T15:50:17.000000000', '2011-08-12T15:50:17.016659999',
           '2011-08-12T15:50:17.033321000', ...,
           '2011-08-12T17:22:05.068359375', '2011-08-12T17:22:05.085449218',
           '2011-08-12T17:22:05.102050781'], dtype='datetime64[ns]')

• Data: (1)
  • (event_time_zero)
    DataArrayView
    binned data [len=0, len=3, ..., len=3, len=2]

    dim='event',
    content=DataArray(
              dims=(event: 456601),
              data=float32[counts],
              coords={'event_time_offset':float32[µs], 'event_id':int32})

NXlog

Provides a time-series log. See the NeXus format NXlog base class definition for details. Can be read as a data array using positional indexing.

Example:

proton_charge = f['/entry/DASlogs/proton_charge']
proton_charge

<scippnexus.base.Group at 0x7fee6b25d5b0>

proton_charge[...]

scipp.DataArray (5.04 MB)

• Dimensions:
  • time: 330473
• Coordinates: (6)
  • average_value
    ()
    float64
    pC
    12766652.799260454

    σ = 5061670.635363746

    Values:
    array(12766652.79926045)
    
    Variances (σ²):
    array(2.56205096e+13)

  • description
    ()
    string
    description

    Values:
    'description'

  • duration
    ()
    float32
    s
    5508.0

    Values:
    array(5508., dtype=float32)

  • maximum_value
    ()
    float64
    pC
    15146700.0

    Values:
    array(15146700.)

  • minimum_value
    ()
    float64
    pC
    0.0

    Values:
    array(0.)

  • time
    (time)
    datetime64
    ns
    2011-08-12T15:50:17.000000000, 2011-08-12T15:50:17.016659999, ..., 2011-08-12T17:22:05.085449218, 2011-08-12T17:22:05.102050781

    Values:
    array(['2011-08-12T15:50:17.000000000', '2011-08-12T15:50:17.016659999',
           '2011-08-12T15:50:17.033321000', ...,
           '2011-08-12T17:22:05.068359375', '2011-08-12T17:22:05.085449218',
           '2011-08-12T17:22:05.102050781'], dtype='datetime64[ns]')

• Data: (1)
  • (time)
    float64
    pC
    1.484e+07, 1.484e+07, ..., 1.487e+07, 1.484e+07

    Values:
    array([14843360., 14843360., 14787820., ..., 14809180., 14873260.,
           14839090.])

NXmonitor

Provides data for a beam monitor. See the NeXus format NXmonitor base class definition for details. Can be read as a scipp.DataGroup holding a scipp.DataArray using positional indexing, similar to NXdetector.

Example:

monitor = f['entry/monitor1']
mon = monitor[...]
mon

scipp.DataGroup

(time_of_flight: 200001)

• mode

  str

  ()

  monitor
• data

  scipp

  DataArray

  (time_of_flight: 200001)

  int32

  25, 10, ..., 0, 0

mon['data']

scipp.DataArray (1.53 MB)

• Dimensions:
  • time_of_flight: 200001
• Coordinates: (2)
  • distance
    ()
    float64
    m
    -1.0

    Values:
    array(-1.)

  • time_of_flight
    (time_of_flight [bin-edge])
    float32
    µs
    0.0, 1.0, ..., 200000.0, 200001.0

    Values:
    array([0.00000e+00, 1.00000e+00, 2.00000e+00, ..., 1.99999e+05,
           2.00000e+05, 2.00001e+05], dtype=float32)

• Data: (1)
  • (time_of_flight)
    int32
    25, 10, ..., 0, 0

    Values:
    array([25, 10, 12, ...,  0,  0,  0], dtype=int32)