Keywords: class-associated-arrays

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### W

The `W` ASSOCIATED ARRAY is a single-precision floating point array providing a channel-based weight array of the spectrum. It can be used as input and output of the `AVERAGE` command (and its other flavors) thanks to the switch `SET WEIGHT ASSOC`. The user can define the weight array of his choice for the input spectra thanks to a sequence like:

      FILE IN ...
      FIND
      FILE OUT ... SINGLE
      FOR I 1 TO FOUND
        GET NEXT
        ! Fill MYARRAY as desired here
        ASSOCIATE W MYARRAY
        WRITE
      NEXT I

and then reuse the output file as input for `SET WEIGHT ASSOC` + `AVERAGE`.