AIPS HELP file for LEVS in 31DEC22
As of Wed Mar 29 16:06:42 2023
Type: Adverb (Real array * 30)
Use: LEVS is an array of up to 30 numbers which represent
contour intervals. The contour spacing is determined by
PLEV (as a percentage of the peak intensity in an image)
or by CLEV (as an intensity). The elements in LEVS must
be in ascending order since the first element smaller
than the preceding element is the indication of the end
of the array. NOTE: the LEVS values do not have to be
integers, but they will be displayed to an accuracy of
5 digits (plus .) with 0, 1, 2, or 3 after the decimal
depending on the value of LEVS.
Null Value: 0 * 30
Null value assignment is -10,-9,-8,-7,-6,-5,-4,-3,-2,-1,
1,2,3,4,5,6,7,8,9,10, 10*0. It is most useful with the
PLEV (Null assignment) of 10.
The procedures below take LEVS as an input (or set LEVS to -10,-9,
...-1,1,2,...10) and then set colors in RGBLEVS to match these
levels with various coloring schemes.
CIRCLEVS......Sets RGBLEVS to fill LEVS with a circular color scheme.
FLAMLEVS......Sets RGBLEVS to fill LEVS with a red flame color scheme.
RAINLEVS......Sets RGBLEVS to fill LEVS with a rainbow color scheme.
STEPLEVS......Sets RGBLEVS to fill LEVS with a repeated sequence of
CCNTR.........Generate a contour plot file from an image with CC or MF
CNTR..........Generate a contour plot file or TV plot from an image.
GREYS.........Plots images as contours over multi-level grey.
KNTR..........Make a contour/grey plot file from an image w multiple
PCNTR.........Generate plot file with contours plus polarization