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about color table [message #66904]

Thu, 18 June 2009 14:40

Hu
Messages: 35
Registered: January 2009

Member

Hi, folks

I want to do something like this: I got an 2-D array with values range
from 0.0 to 1.0. and I want to display the array using different
colors. for example, if the value is greater than 0.8, the elements
will be displayed as red, if the values is between 0.5 and 0.8, the
color will be blue, and the relationship can be listed as follows:

> 0.8 red
0.5-0.8 blue
0.3-0.5 yellow
0.2-0.3 green
<0.2 white

I know I need to set up a color table, and the book 'IDL Programming
techniques' demostrate how to set up a color table, and I set up the
table including those above colors.

The question is , How can I set up the relationship between the color
table and the different ranges? I mean how to 'tell' the computer
display the array using this relationship?

Thanks

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[Message index]

		about color table By: Hu on Thu, 18 June 2009 14:40
		Re: about color table By: Michael Galloy on Sun, 21 June 2009 12:46
		Re: about color table By: David Fanning on Fri, 19 June 2009 20:58

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