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Stretch color image with colorbar compatible issue [message #91022]

Tue, 26 May 2015 12:17

changliao1025
Messages: 4
Registered: January 2015

Junior Member

Hi, there!
I am using the cgimage and cgcolorbar to draw some data.
I have to use the stretch keyword in cgimage since data is not quite nice.
However, the colorbar remains the same regardless the stretch changes.
What should I do?

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Re: Stretch color image with colorbar compatible issue [message #91025 is a reply to message #91022]

Tue, 26 May 2015 20:23

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

changliao1025@gmail.com writes:

> I am using the cgimage and cgcolorbar to draw some data.
> I have to use the stretch keyword in cgimage since data is not quite nice.
> However, the colorbar remains the same regardless the stretch changes.
> What should I do?

Why is this a problem? Do you mean you don't know how to label the color
bar?

You probably have to apply the same scaling (use cgSclImg) to the color
table vectors, as in this article, to get what you want:

http://www.idlcoyote.com/ip_tips/logscaledbar.html

What kind of stretch are you applying?

Cheers,

David

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

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