Keywords: class-average

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### Position matching

            LAS\SET MATCH Tol

        Turn on the checking of position-matching in ACCUMULATE and AVERAGE. Tol
        is  the  position tolerance in current units. The default is SET MATCH 2
        (arcsec). The tolerance is also used in FIND, MAP and a few  other  com-
        mands.

            LAS\SET NOMATCH

        Turn off checking of position-matching in ACCUMULATE and  AVERAGE.  This
        does not change the tolerance for the other functions like FIND and MAP.