LEVELS

##
LEVELS

            [GREG2\]LEVELS [Args ...]

        LEVELS without arguments will display the contour levels used by command
        RGMAP.   The  level  values  can  also  be  found in the array GREG%LEV-
        ELS[GREG%NLEVEL] (not defined if no levels), where  GREG%NLEVEL  is  the
        number of levels (0 if no levels).

            [GREG2\]LEVELS NONE

        reset the level list (and thus GREG%NLEVEL becomes 0).

            [GREG2\]LEVELS C1 C2 TO C3 BY C4 ...

        Sets  the  contour levels to be C1, C2, C2+C4, C2+2*C4, ..C3, and so on,
        using the same list format as SIC\ command FOR. The contour  levels  are
        used  to  make  contour  plots  of  the Regular Grid array using command
        RGMAP. Up to 40 contours can be given at a time. Note that  it  is  more
        efficient to use a single RGMAP command with many levels than many RGMAP
        commands with a single level each.

            [GREG2\]LEVELS EXPO Step [Linear Scale]

        Sets the contour levels in a semi-exponential scale. Linear is the  num-
        ber of linear levels: levels from -Linear*Step to -Step by Step and Step
        to Linear*Step by Step are regularly spaced. Above Linear*Step, the next
        contour level is Scale times larger than the previous one.  The defaults
        are Step=1, Linear=3 and Scale=sqrt(2).