AIPS HELP file for RGBLEVS in 31DEC22
As of Sun Feb 5 19:56:48 2023
Type: Adverb Real array * (3,30)
Use: RGBLEVS is an array of Red, Green, Blue colors to be used with
each of the up to 30 LEVS in contouring. Color levels range
from 0 (dark) to 1 (bright) and, if any of RGBLEVS is not zero,
color contours will be used by the plot task. Usage is
RGBLEVS(1,i) red color (0-1) assigned to LEVS(i)
RGBLEVS(2,i) green color (0-1) assigned to LEVS(i)
RGBLEVS(3,i) blue color (0-1) assigned to LEVS(i)
There is a RUN file which will define procedures which set
values into RGBLEVS.
RUN SETRGBL to compile procs
set the LEVS you want, then
CIRCLEVS blue to red or blue through red to
RAINLEVS standard rainbow pattern
FLAMLEVS red flame (red to white)
STEPLEVS Various step patterns from 5 to 10
All of these find the point at which the lEVS switches from
negative to positive and then works outwards in both directions.
LEVS = -6, -4, -2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
the -2 and 1 levels will have the same first color, the -4 and 2
levels will have the same second color, the -6 and 3 levels will
have the same third color, and levels 4 through 10 will have
different colors. The full range of the algorithm's colors will
be spread from 1 to 10 (except the step ones which will repeat
When using RGBLEVS, LTYPE also controls whether a line in color
appears in the plot at the bottom, the top, or not at all.
Values of LTYPE=-10 to 10 give a line inside the contour plot at
the bottom; values from -20 to -11 and 11 to 20 give the line
inside the plot at the top, and values -30 to -21 and 21 to 30
omit the color listing of the LEVS. The units digit retains the
same meaning for this extended range of LTYPE.
Null Value: all zero
Null value means to use normal rather than colored contours.
KNTR.....Make a contour/grey plot file from an image w multiple
panels using a contour-folowing algorithm.
PCNTR....Generate plot file with contours plus polarization vectors
using a pixel-based contouring algorithm.