"Are there examples of code that reads NeXus data?" - asked at Nobugs 2018

[prjemian]

Specifically, examples of code that reads specific application definitions and raise the prominence in the documentation

This will be a third subsection in examples/index.rst

[toqduj]

Very soon SasView 4.2.1 will have a functioning NXcanSAS reader. DAWN reads generic NeXus, and outputs NXcanSAS.

[prjemian]

@toqduj Can you provide URL to specific example in SASview?

[benajamin]

NXstxm can be read by:

• Mantis, with the NeXus-specific python code here
• aXis2000, with the NeXus-specific IDL code in the read_nexus.pro file

[benajamin]

SasView has python code to read and write NXcanSAS

[phyy-nx]

Dials code for reading NXmx: https://github.com/cctbx/dxtbx/blob/master/format/nexus.py
cctbx.xfel code for writing NXmx master files for JF16M at SwissFEL: https://github.com/cctbx/cctbx_project/blob/master/xfel/swissfel/jf16m_cxigeom2nexus.py

[benajamin]

Dawn has java code to read and write HDF5 NeXus files (generic NeXus, not tied to specific application definitions).

[mkoennecke]

A F77 reading routine using NAPI for POLDI at SINQ PSI
poldi.zip The archive includes the code and an example of a file which it reads

[mkoennecke]

FOCUS stuff:
focus.zip
The archive contains:

• An example FOCUS file
• focusreport: A h5py program which skips through a list of files and prints statistics
• focusreport.tcl, same as above but in Tcl using the Swig generated binding to NAPI
• i80.f contains a F77 routine for reading FOCUS files into Ida. The routine is RRT_in_Foc.

[mkoennecke]

ZEBRA stuff in
zebra.zip
This contains:

• an example file
• zebra-to-ascii, a h5py script which dumps a zebra file to ASCII
• TRICSReader.* for reading ZEBRA files in C++ using C-NAPI calls

[mkoennecke]

NXreader.zip
This is some java code which reads NeXus files into ImageJ. It uses the Java-hdf interface to HDF5. It tries to do a good job locating the image dataset by NeXus conventions. But it uses the old style conventions.

[prjemian]

Once these are written into the user guide, this issue can be closed.

[prjemian]

HDF5gateway makes it easy to read a HDF5 file into an IgorPro folder, including group and dataset attributes, such as a NeXus data file, modify it, and then write it back out.

[prjemian]

Hmmm... This list is similar to, yet different from, the listing in the utilities section of the manual. Enough that I will put all this content into the utilities page with a link from the Examples page.