Keywords: class-evol1

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## Index consistency

Loading a whole index as a 2D array implies that all the spectra are consistent (basically the same coordinate system and the same frequency axis) to obtain meaningful results. A new command, named `LAS\CONSISTENCY`, was introduced to check the consistency of all the spectra of the current index. The source name, the source position, the line name and the frequency axis are checked by default. It is possible to avoid one or several of those checks with the `NOCHECK` option. The commands which work on the whole index (e.g. `LOAD` or `TABLE`) automatically trigger the check of the index consistency, if this check was not already done previously.