matplotlib-users

[Matplotlib-users] Increase max polygons/patches

[Daniel W. <dan...@gm...>]

Greetings, MPL Users.

I have a very detailed array that I am visualizing using pcolor mesh.  When
the size of the array surpasses some threshold (I don't know the value),
pcolormesh stops drawing polygons/patches.  Thus, I only see some percentage
of my array.  Is there a way to increase the number of polygons/patches MPL
will draw to screen?

Thanks.
-dw

Re: [Matplotlib-users] Increase max polygons/patches

[Michael D. <md...@st...>]

There is no hard coded limit to the number of quads in a pcolormesh.  
(Unlike the limit of the number of points in a path in the Agg 
backend).  Can you provide some code that reproduces the error?

Also, which version of matplotlib, platform and backend are you using?

Mike

On 04/21/2011 12:20 PM, Daniel Welling wrote:
> Greetings, MPL Users.
>
> I have a very detailed array that I am visualizing using pcolor mesh. 
>  When the size of the array surpasses some threshold (I don't know the 
> value), pcolormesh stops drawing polygons/patches.  Thus, I only see 
> some percentage of my array.  Is there a way to increase the number of 
> polygons/patches MPL will draw to screen?
>
> Thanks.
> -dw
>
>
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-- 
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA

Re: [Matplotlib-users] Increase max polygons/patches

[John H. <jd...@gm...>]

On Thu, Apr 21, 2011 at 11:22 AM, Michael Droettboom <md...@st...> wrote:
> There is no hard coded limit to the number of quads in a pcolormesh.
> (Unlike the limit of the number of points in a path in the Agg backend).
> Can you provide some code that reproduces the error?
>
> Also, which version of matplotlib, platform and backend are you using?

Is this potentially a path.simplify issue?  If you set path.simplify
to False in your rc params, does the problem go away?

  import matplotlib
  matplotlib.rcParams['path.simplify'] = False

In older versions of matplotlib, there was a bug in path.simplify that
caused it to simplify paths to the point where it caused perceptual
problems.  The current path.simplify is not supposed to produce
detectable changes, so as Michael said please include your mpl version
in your response.

JDH