LAS\AVERAGE [/NOMATCH]
Average all the spectra of the current index using the current weighting
function (see SET WEIGHT) and alignment mode (see SET ALIGN). The homo-
geneity of calibration is checked according to SET CALIBRATION. Bad
channels are handled according to SET BAD. A sum may be interrupted by
<^C>, but the results is then undefined.
The position coincidence of consecutive spectra will not be checked if
option /NOMATCH is present. Else, this check relies on the current SET
[NO]MATCH status. See SET MATCH to build an index with a given position-
ing tolerance.