[Matplotlib-users] Fwd: color pallette suggestions wanted

[Damon M. <dam...@gm...>]

Forgot to reply all.

---------- Forwarded message ----------
From: *Damon McDougall*
Date: Friday, October 12, 2012
Subject: [Matplotlib-users] color pallette suggestions wanted
To: Andreas Hilboll <li...@hi...>


On Fri, Oct 12, 2012 at 10:17 AM, Andreas Hilboll
<li...@hi...<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