Re: [matplotlib-devel] Axes.scatter call fails since removal of PyCXX

On 11/18/2014 08:29 PM, Thomas Caswell wrote:
> Is there an issue for this (and if not can you make one)?

This is https://github.com/matplotlib/matplotlib/pull/3811 which is 
fixed and merged.  Should it still be an issue?

>
> On Mon, Nov 17, 2014, 09:56 Joel B. Mohler <jo...@ki... 
> <mailto:jo...@ki...>> wrote:
>
>     On Mon, Nov 17, 2014 at 09:36:50AM -0500, Joel B. Mohler wrote:
>     > I think I see a breakage of the scatter call that I think should
>     work and did
>     > work before
>     >
>     https://github.com/matplotlib/matplotlib/commit/be34210a8c09fcd639ece583eb5c0acb855222b6
>     >
>     > This is running on windows 7 (32 bit) with numpy 1.8 and current
>     master.
>
>     Ugh, I tried this same example on my ubuntu box and it works. I
>     update this
>     diagnosis to "scatter is broken on windows since removing PyCXX";
>     note that I
>     do not get a traceback with the code below if I replace "scatter"
>     with "plot".
>
>     Being that windows devs are scarce, I'll be digging into this more.  I
>     certainly welcome any clues as it seems very bizarre to me so far.
>
>     Joel
>
>     >
>     > The example is:
>     >
>     > ***
>     > import numpy
>     > from matplotlib.backends.backend_agg import FigureCanvasAgg as
>     FigureCanvas
>     > from matplotlib.figure import Figure
>     >
>     > POINTS = 500
>     >
>     > figure = Figure(figsize=(6, 6), dpi=72)
>     > ax = figure.add_subplot(1, 1, 1, projection=None)
>     > scat = ax.scatter(numpy.arange(POINTS),
>     numpy.sin(numpy.arange(POINTS)))
>     > ***
>     >
>     > I get on current master
>     >
>     > ***
>     > Traceback (most recent call last):
>     >   File "C:\work\mpl_scatter_example.py", line 9, in <module>
>     >     scat = ax.scatter(numpy.arange(POINTS),
>     numpy.sin(numpy.arange(POINTS)))
>     >   File "C:\Python27\lib\site-packages\matplotlib\axes\_axes.py",
>     line 3690, in scatter
>     >     self.add_collection(collection)
>     >   File "C:\Python27\lib\site-packages\matplotlib\axes\_base.py",
>     line 1459, in add_collection
>     >     self.update_datalim(collection.get_datalim(self.transData))
>     >   File
>     "C:\Python27\lib\site-packages\matplotlib\collections.py", line
>     198, in get_datalim
>     >     offsets, transOffset.frozen())
>     >   File "C:\Python27\lib\site-packages\matplotlib\path.py", line
>     977, in get_path_collection_extents
>     >     master_transform, paths, transforms, offsets,offset_transform))
>     > ValueError: object too deep for desired array
>     > ***
>     >
>     > I did very little troubleshooting beyond confirming that this
>     works before the
>     > merge mentioned in the first paragraph.
>     >
>     > Joel
>
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