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problem with color table, everything is red [message #82051]

Mon, 19 November 2012 02:13

simona bellavista
Messages: 56
Registered: December 2009

Member

I am having a hard time understanding colors in IDL. I am working on
x11 (linux).
I would be glad if someone can give me some tips about colors and
color tables.

when I try to load rainbow color table and display it with

loadct, 13
tv, dist(300)

I always get a color panel that is in grey scale, I have tried to load
several color tables, but the resulting color panel I get is always in
shade of greys.

Moreover, if I try to plot different part of my graphics with
different colors, using something like this:

for i=0,n-1 do begin
indx = start[i] + indgen(start[i+1]-start[i])
color = floor(i *255 / float(nlines))
oplot,x[indx],y[indx],color=color
endfor

I get my plot in shades of reds. I tried cgplot and it is the same.

then in a subsequent plot I try to revert to black and white, and I
use

plot, xx, yy,color=255, psym=2, symsize=2,

but everything turn red.

where shall I start?

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problem with color table, everything is red

By: simona bellavista on Mon, 19 November 2012 02:13

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