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Re: colorbar [message #88411 is a reply to message #88410]

Wed, 23 April 2014 06:52

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

shbhuk@gmail.com writes:

> On using cgcolorbar and tvim for the same, the colorbar obtained does not match with the color values in the image.

Yes, because you scale your image into 255 values, but use only 100
colors in your color bar. If you want to match your image, the values in
the image have to match the colors in the color bar.

cgloadct, 4, ncolors=100
grid = cgDemodata(18)
grid = bytscl(grid, Top=99, Min=0, Max=100)
cgImage, grid, Position=[0.125, 0.1, 0.925, 0.8], /Axes
cgColorbar, ncolors=100, range=[0, 100]

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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[Message index]

		colorbar By: shbhuk on Wed, 23 April 2014 05:53
		Re: colorbar By: David Fanning on Wed, 23 April 2014 06:52

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