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cgScaleVector and diverging colorbar help [message #91284] Thu, 25 June 2015 08:59 Go to previous message
sam.tushaus is currently offline  sam.tushaus
Messages: 14
Registered: February 2015
Junior Member
Hello all! I'm trying to create a plot with a diverging colorbar. I would like white to correspond to 0, and my data is typically in the range [-5,70] on a latitude-longitude grid.

I've been using this page (http://www.idlcoyote.com/code_tips/scaleimage.html) as a reference. The first problem comes when I try to use cgImage to display my scaled data - the map becomes highly distorted. Is there any way to fix this?

My second problem comes when I try to use cgContour to display my scaled data instead of cgImage. The contouring looks generally correct, but the whole range of the colorbar is used in the contouring. This is a problem because my data range is [-5,70] and I want 0 to be white.

I really appreciate any comments or hints on how to fix this. Thanks!

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