Re: Data analysis question

"Mindy Lee" <[email protected]>
Newsgroups gmane.comp.science.photonic-bands
Message-ID <[email protected]>
Just one more question. If I use multiple color scheme, how do I print out
the colorbar to indicate what color corresponding to what intensity scale?

Thank you!

On Thu, May 22, 2008 at 4:11 PM, Steven G. Johnson <[email protected]>
wrote:

>
> On May 22, 2008, at 4:03 PM, Mindy Lee wrote:
> > I have another question. When I choose colormap -c bluered -Z I can
> > get the color in red only. Is there any possibility to make it all
> > blue?
>
> Yes, you can use the -r option to reverse the colormap order.
>
> However, if you have data that goes from 0 to some positive value,
> then -Z bluered (with or without reversal) is probably not the best
> color scheme; it was designed for positive+negative data, whereas for
> single-signed data it only uses one color and hence only a small part
> of the dynamic range available from color.  For all-nonnegative data
> like an energy density, I usually prefer the "hot" color scheme, which
> goes from black to red to yellow to white (like a heated black body).
>
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