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---------- Forwarded message ----------
From: *Damon McDougall*
Date: Friday, October 12, 2012
Subject: [Matplotlib-users] color pallette suggestions wanted
To: Andreas Hilboll <li...@hilboll.de>
On Fri, Oct 12, 2012 at 10:17 AM, Andreas Hilboll
<li...@hilboll.de<javascript:;>>
wrote:
> Hi,
>
> I have some data I want to plot using pcolormesh. It's 2d climatological
> data, see the attached plot. My data is in a range from -7 to +0.6. I want
> to be 0.0 to be clearly visible, while at the same time, the color range
> should show the full dynamic of the values. I played with the bwr and
> seismic color maps, centering on zero, so that white is 0.0. However, I'm
> not too happy with the dynamic range I get in the negative.
Your data is not symmetric about zero, so you will always get a result
the looks 'too dynamic' in the negative values (that is, if you want
to use the whole colour map range). You need to make a sacrifice
somewhere to get the effect you want.
1) Move your data so it's symmetric around zero, that way you'll get a
nice dynamic change, but the position of 'zero' will be less clear.
2) Don't move your data and use a truncated colour map. That way the
position of 'zero' will be clear but you'll get less dynamic change in
the negative values.
Hope this helps.
Best,
Damon
--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom
--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom
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