AIPS HELP file for RAINLEVS in 31DEC20
As of Mon Sep 21 8:58:36 2020
RAINLEVS: Proc to set RGBLEVS to a rainbow color scheme
LEVS $ Contour levels
RGBGAMMA $ 0.0 Gamma correction parameter
RGBLEVS @ 0.0 1.0 RGB for each LEVS in order
Proc: This procedure will set RGBGAMMA if it is not positive, will
examine the LEVS values and set them to -10 to -1 followed by 1
to 10 if they are not set. Then it will determine a rainbow
pattern of colors from blue to green to red. It will set
RGBLEVS so that the first positive LEVS and first negative LEVS
will be blue, the 2nd positive and 2nd negative LEVS will be
somewhat more green and so forth so the highest LEVS (positive
and or negative) will be red.
Before using this procedure you must enter
which will define this and 3 other procedures. Any time you
change the values in LEVS, you should then enter
again to select the new set of colors. Note that these colors
are similar to those of the verb TVPSEUDO with Button A.
RGBGAMMA...If 0 on input, set to 2.2. The gamma correction
parameter to adjust colors (value used = input value to
the 1/RGBGAMMA power). Larger values make more pastel
LEVS.......Contour level multipliers. Up to 30 values in increasing
order - if all 0 on input, set to -10 to -1, 1, to 10.
Defines which values require colors and what their range
should be. Thus, if you change LEVS, you should execute
RGBLEVS....RGB colors (3,30) for each of the LEVS in use.
II, JJ, KK, XX, YY, RR, GG, BB, TT are all changed by the procedure.