[Nexus] Correct way to specify multiple signals

[V. Armando Solé]

On 11/01/2018 14:09, Jacob.Filik at Diamond.ac.uk wrote:

> This is really fun to try and do if energy can be the fast axis (for a dispersive detector) or the slow axes (for a monochromator scan) of the dataset.

The order of axes in NXdata should solve that.

Besides that, in the 2010 NIAC meeting it was decided to be able to
associate an attribute"interpretation" to datasets with possible values
"scalar", "spectrum", "image" precisely to know how to deal with
multidimensional datasets assuming C order.

A 1000 x 2000 x 4000 dataset with attribute interpretation set to image
would correspond to 1000 images of 2000 rows and 4000 columns.
A 1000 x 2000 x 4000 dataset with attribute interpretation set to
spectrum would correspond to 1000 x 2000 spectra of 4000 channels.

At the ESRF we are using that since long ago and it is used to reduce
user interaction and to present default views for individual datasets
not selected via an NXdata group.

Armando