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AVERAGE /NOCHECK

        LAS\AVERAGE   /NOCHECK   [SOURCE|POSITION|LINE|SPECTROSCOPY|CALIBRA-
    TION|SWITCHING]

    By  default,  AVERAGE  checks  the consistency of all the input spectra.
    This is a security to avoid mixing inconsistent data (e.g. spectra  from
    different  sources).  These checks can be individually (with one or more
    names) or all (no name) disabled using the option /NOCHECK. See HELP SET
    NOCHECK for details.

    Note  the  key status of the SPECTROSCOPY check! AVERAGE uses this check
    to detect if the spectra X axes are aligned or not, to help its decision
    to  enable  resampling  or  not (see /RESAMPLE subtopic). Using /NOCHECK
    SPECTROSCOPY enforces the spectra alignment status:

    AVERAGE /NOCHECK SPECTROSCOPY
        will assume the spectra are aligned and will stack them  channel  by
        channel (no resampling), while they are possibly not aligned.

    AVERAGE /RESAMPLE /NOCHECK SPECTROSCOPY
        will  assume  the  spectra  are not aligned and will always resample
        them before stacking, even if not necessary (adds  computation  cost
        and possible round off errors).


Gildas manager 2018-08-19