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Re: switch colortable [message #31918 is a reply to message #31820]

Thu, 22 August 2002 20:48

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

tom (tom2959@21cn.com) writes:

> Thanks. A very simple contour plot is as following:
>
> levels=12
> LoadCT, 0, Bottom=1,NColors=levels
> ; TVLCT, r, g, b, /Get
> ;TVLCT, Reverse(r), Reverse(g), Reverse(b)
>
> maxp=max(peak,/nan) & minp=min(peak,/nan)
> step = (Maxp - Minp) / levels
> userLevels = IndGen(levels) * step + Minp
> ; Draw a colorbar.
> Contour,
> peak,x,y,/cell_fill,Background=white,C_Colors=Indgen(levels) +1,Levels=userLe
> vels
>
> I hope the color at maximum is black. Your suggestion sems does not help.

Ah, well, you are changing the problem on me. :-)
Try this:

levels=12
LoadCT, 0, Bottom=1,NColors=levels
TVLCT, r, g, b, /Get
TVLCT, Reverse(r[1:12]), Reverse(g[1:12]), Reverse(b[1:12]), 1

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: switch colortable By: tom on Thu, 22 August 2002 20:24
		Re: switch colortable By: David Fanning on Thu, 22 August 2002 05:34
		Re: switch colortable By: David Fanning on Thu, 22 August 2002 20:48

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