Re: [Matplotlib-users] register colormap collection

[Thomas C. <tca...@gm...>]

Have a look at how cmocean (https://github.com/matplotlib/cmocean) works
under the hood.

I think the options are:
   - use a module to supply your color maps (from my_cmap_collection import
my_cmap) and then pass those objects through to the functions
   - have your module call the register code on import (or on calling a
helper function which call the registration code) so that you can simply
pass the string name through and `get_cmap` will do the right thing.

Tom

On Thu, Oct 1, 2015 at 6:20 AM Eric Gayer <eg...@gm...> wrote:

> Hi all,
>
> I have a question about how to permanently register customs colormap into
> matplolib. I went across the cookbook and the definition of cm.register, I
> also checked on stack overflow and found this post
>
>
>> http://stackoverflow.com/questions/8738239/permanently-registering-colormaps-in-matplotlib
>>
>
> but I still quite don't understand how the registration works, and how to
> make the registration working across different scripts.
>
> I have a set of colormap that I manage to transform from their original
> format (.cpt or .clr) to matplotlib object :
>
> <matplotlib.colors.LinearSegmentedColormap object at 0x1033406d0>
>
> My first though was that I could register these colormap objects once as
> list for exemple, and then call them anytime in any script, the same way we
> do call any matploltlib colormap preset with matplotlib.cm.jet etc...
>
> It looks like this is not possible since register a colormap, and call it
> using get_map(mycmap) does not work across different script.
>
> I clearly don't get the logic behind the registration of the colormap, and
> I am looking for a way to stock all my custom colormap somewhere in a file
> or module, that I could import in every script and then call the colormap
> the way we call the matplotlib colormap collection, maybe not using
> matplolib.cm. but with a custom function similar to.
>
> Thanks for helping me understand le logic of "saving"/registring colormaps
> and pointing me to direction to create my own colormap collection and a
> simple way to use them
>
> Eric
>
>
>
>
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