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Re: Continuous colorbar [message #71543 is a reply to message #71542]

Mon, 28 June 2010 08:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

zhangyehui writes:

> I want to draw a contour map of correlation coefficients with
> continuous color. As R varies between [-1, 1], I'd like those are
> close to 0 shown in white color and those are close to 1(-1) with
> darker colors. I usually use loadct colorbars. There are 41 colorbars.
> But I can't find a colorbar with a white color in the middle. So I
> just wondered if there is anyway I can do that. Thanks in advance.

You can download a Brewer color table file here:

http://www.dfanning.com/programs/fsc_brewer.tbl

Once the file is located somewhere on your IDL path,
you can use it with all of the color tools available
in the Coyote Library. And, in particular, with CTLOAD
or XCOLORS by setting the /BREWER keyword. There are
about 12 divergent color tables amoung the 28 offered.
I use them all the time for exactly this purpose.

http://www.dfanning.com/color_tips/brewer.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thue. ("Perhaps thos speakest truth.")

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[Message index]

		Re: Continuous colorbar By: zhangyehui on Mon, 28 June 2010 10:41
		Re: Continuous colorbar By: Michael Galloy on Mon, 28 June 2010 09:02
		Re: Continuous colorbar By: zhangyehui on Mon, 28 June 2010 08:43
		Re: Continuous colorbar By: David Fanning on Mon, 28 June 2010 08:42
		Re: Continuous colorbar By: penteado on Mon, 28 June 2010 08:19

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