| Re: Overlaying filled contour plots [message #26069 is a reply to message #25925] |
Mon, 30 July 2001 13:44  |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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"Pavel A. Romashkin" <pavel.romashkin@noaa.gov> writes:
> Couldn't you process the two data sets first and then visualize the
> single result, instead of thinking how to combine two different visuals?
> Cheers,
> Pavel
>
> Simon de Vet wrote:
>>
>> I have two sets of data for a series of points. One set indicates the
>> values of a certain parameter, the others are the values of another
>> parameter.
>>
>> Is there a way to overlay two filled contour plots? I'd like, for
>> example, to have one of the values plotted in red, the other in blue,
>> with purple (or another colour) where they overlap. These contour maps
>> have two levels each (on and off), so I don't need to worry about shades
>> of red or shades of blue. I just need conours for four states: both on
>> (purple), both off (white), one on other off and vice versa (red and
>> blue).
Pavel is on the right track here I think. Couldn't you do the following:
y = on1 * 2 + on2
contour, y, levels=[0,1,2,3]
Then adjust your color table to match what you need. ( like, 0=black,
1=red, 2=blue, 3=purple).
Or, the other possibility is to render both contour plots, TVRD()
them, and then perform the bit twizzling on the images. :-)
Craig
--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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