Experimental Physics and
Industrial Control System

Gabriel de Souza Fedel <[email protected]> · Wed, 9 May 2018 16:30:46 -0300

Hi Peter

On 09-05-2018 10:00, Pete Jemian wrote:

When not using the EPICS Area Detector HDF5 File Writing Plugin to write

area detector data into a NeXus file, our USAXS instrument uses custom

Python code and the h5py package to write NeXus files.

On 2018-05-09 7:22 AM, Matt Newville wrote:

 From python, nexpy (https://github.com/nexpy/nexpy) is very useful

for working with nexus data, either from plain python programs, or

from its very nice GUI.  You can also sort of "roll your own" by using

HDF5 + the nexus conventions.  That's probably not "recommended", but

it can work in a pinch.

The NeXus International Advisory Committee advises to use the NAPI

support library when writing NeXus data files.  But when the NIAC

members were asked who among them uses the NAPI, the response was less

than half. Thus, there are code examples for NAPI and non-NAPI file

writers here:

http://download.nexusformat.org/doc/html/examples/index.html#code-examples-that-use-the-nexus-api-napi

For Python, see this page:

http://download.nexusformat.org/doc/html/examples/h5py/index.html

Use any software you wish to write a NeXus HDF5 data file.  The

documentation is the "NeXus: User Manual"

(http://download.nexusformat.org/doc/html/user_manual.html).

There are programs to check if a given data file passes validation.  See

this page for the list from NeXus:

http://download.nexusformat.org/doc/html/validation.html ; As its author,

I suggest you try the punx program if you wish to validate your data files.

Thank you for te references!

Regards

--
Gabriel Fedel
Software de Operação das Linhas de Luz
Laboratório Nacional de Luz Síncrotron – (LNLS)
Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
[email protected] | +55 (19) 3512 1226
www.lnls.cnpem.br

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System