matplotlib-devel

[matplotlib-devel] assertion error with xkcd

[Neal B. <ndb...@gm...>]

This was using pdfpages (if that matters)

Traceback (most recent call last):
  File "./plot_stuff2.py", line 326, in <module>
    the_plot.finish (args, opt, time, res)
  File "./plot_stuff2.py", line 145, in finish
    self.pdf.savefig (self.fig)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backends/backend_pdf.py", line 2297, in savefig
    figure.savefig(self, format='pdf', **kwargs)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/figure.py", 
line 1421, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backend_bases.py", line 2220, in print_figure
    **kwargs)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backends/backend_pdf.py", line 2340, in print_pdf
    self.figure.draw(renderer)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/artist.py", 
line 54, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/figure.py", 
line 1034, in draw
    func(*args)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/artist.py", 
line 54, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/text.py", 
line 589, in draw
    self._fontproperties, angle)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/patheffects.py", line 102, in draw_text
    self._draw_text_as_path(renderer, gc, x, y, s, prop, angle, ismath)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/patheffects.py", line 112, in _draw_text_as_path
    ismath)
  File "/home/nbecker/.local/lib/python2.7/site-
packages/matplotlib/backend_bases.py", line 526, in _get_text_path_transform
    path = Path(verts, codes)
  File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/path.py", 
line 147, in __init__
    assert vertices.ndim == 2
AssertionError

Re: [matplotlib-devel] assertion error with xkcd

[Benjamin R. <ben...@ou...>]

Can you provide a code example to reproduce this. I suspect that recent
work on path effects might be to blame here. Also, exactly which version of
matplotlib and numpy were you using? The assert was placed there about a
year ago IIRC to deal with a short-lived numpy bug.

Re: [matplotlib-devel] assertion error with xkcd

[Neal B. <ndb...@gm...>]

Benjamin Root wrote:

> Can you provide a code example to reproduce this. I suspect that recent
> work on path effects might be to blame here. Also, exactly which version of
> matplotlib and numpy were you using? The assert was placed there about a
> year ago IIRC to deal with a short-lived numpy bug.

The code is large and reads a bunch of data to plot.


The line that triggers the error says:

    self.pdf.savefig (self.fig)

Would it be useful to provide a pickled fig (umm,,, pickled figs)

Re: [matplotlib-devel] assertion error with xkcd

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

On 10/23/2013 09:51 AM, Neal Becker wrote:
> Benjamin Root wrote:
>
>> Can you provide a code example to reproduce this. I suspect that recent
>> work on path effects might be to blame here. Also, exactly which version of
>> matplotlib and numpy were you using? The assert was placed there about a
>> year ago IIRC to deal with a short-lived numpy bug.
> The code is large and reads a bunch of data to plot.
>
>
> The line that triggers the error says:
>
>      self.pdf.savefig (self.fig)
>
> Would it be useful to provide a pickled fig (umm,,, pickled figs)
No, we really need a self-contained example that triggers it.  We 
already have a self-contained example that works (multipage_pdf.py in 
the examples)...  So there's something extra that's happening in your 
context.  Maybe start with multipage_pdf.py and add things from your own 
app until it breaks?

Mike


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Re: [matplotlib-devel] assertion error with xkcd

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

Can you provide a standalone example to reproduce?  The multipage_pdf.py 
example works fine with xkcd switched on.

Mike

On 10/23/2013 08:01 AM, Neal Becker wrote:
> This was using pdfpages (if that matters)
>
> Traceback (most recent call last):
>    File "./plot_stuff2.py", line 326, in <module>
>      the_plot.finish (args, opt, time, res)
>    File "./plot_stuff2.py", line 145, in finish
>      self.pdf.savefig (self.fig)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/backends/backend_pdf.py", line 2297, in savefig
>      figure.savefig(self, format='pdf', **kwargs)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/figure.py",
> line 1421, in savefig
>      self.canvas.print_figure(*args, **kwargs)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/backend_bases.py", line 2220, in print_figure
>      **kwargs)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/backends/backend_pdf.py", line 2340, in print_pdf
>      self.figure.draw(renderer)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/artist.py",
> line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/figure.py",
> line 1034, in draw
>      func(*args)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/artist.py",
> line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/text.py",
> line 589, in draw
>      self._fontproperties, angle)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/patheffects.py", line 102, in draw_text
>      self._draw_text_as_path(renderer, gc, x, y, s, prop, angle, ismath)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/patheffects.py", line 112, in _draw_text_as_path
>      ismath)
>    File "/home/nbecker/.local/lib/python2.7/site-
> packages/matplotlib/backend_bases.py", line 526, in _get_text_path_transform
>      path = Path(verts, codes)
>    File "/home/nbecker/.local/lib/python2.7/site-packages/matplotlib/path.py",
> line 147, in __init__
>      assert vertices.ndim == 2
> AssertionError
>
>
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