[yt-users] Using multiple colormaps in projection_plot

[Nathan Goldbaum]

On Thu, Jun 25, 2015 at 10:00 AM, Cameron Hummels <chummels at gmail.com>
wrote:

> Hi Gabriel,
>
> I introduced the ability to make customized colormaps in yt a few months
> back in the development branch.  You should be able to make a custom
> colormap that just covers the linear range of 300-1000 with something like
> one colormap and then 3200-5500 with another colormap custom colormap.  See
> the docs here:
>
> http://yt-project.org/docs/dev/visualizing/colormaps/index.html
>

You can also pass a custom colormap defined via matplotlib (e.g. a
LinearSegmentedColormap) to the set_cmap function that's attached to yt
plot objects.


>
>
> Cameron
>
> On Thu, Jun 25, 2015 at 9:10 AM, Gabriel Goodwin <ggoodwin52 at gmail.com>
> wrote:
>
>> Hi All,
>>
>> I have a question regarding projection plot colormaps that maybe someone
>> can answer. I plot temperature data for combustion simulations, with
>> temperature in the flame ranging from 3200K - 5500K and temperature outside
>> of the flame ranging from 300K to 1000K. I want to generate projection
>> plots using two different colormaps, one for the flame and one for outside
>> of it.
>>
>>
>>
>> I have been using kamae_r for the whole range 300 – 5500, but I lose
>> resolution in both the flame and unburned gas regions because of the large
>> range of my colorscale. Since none of my computational cells have a
>> temperature in the intermediate region, 1000 – 3200, I want to make plots
>> with two separate colormaps, or one colormap that combines two fully
>> resolved colormaps for those temperature intervals, to show my data more
>> clearly.
>>
>>
>>
>> I have been playing around with making a custom colormap by working
>> directly with matplotlib (using the LinearSegmentedColormap function), but
>> it is very difficult to get the resolution correct when setting the color
>> intervals and interpolation by hand.
>>
>>
>>
>> Any advice is appreciated!
>>
>>
>> _______________________________________________
>> yt-users mailing list
>> yt-users at lists.spacepope.org
>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>
>>
>
>
> --
> Cameron Hummels
> Postdoctoral Researcher
> Steward Observatory
> University of Arizona
> http://chummels.org
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/20150625/7ac38d14/attachment.htm>