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On Wed, Dec 31, 2014 at 9:45 AM, Benjamin Root <ben...@ou...> wrote:
> What might be happening is that the patch being added has no area. The
> logic it is failing in is in the autoscaling section, I believe. This is
> why if there are other things already in the plot or with other patches,
> then the code works fine because the limits aren't identical.
>
If it is helpful, when I print the value of the patch, I get this:
 patch is: Poly((735597, -12) ...)
What's weird though, is that the other plot I'm talking about is a
*different* plot entirely (different canvas instance), and can be closed
first and still "allow" the patch plot to be shown without errors.
>
> Still though, I thought we had enough logic checks to prevent this sort of
> error. I see you are using Python 2.5, which is older than what we
> currently support. Which version of matplotlib are you using?
>
I'm using matplotlib 1.1.0. I could try upgrading.
>
> Cheers!
> Ben Root
>
>
> On Wed, Dec 31, 2014 at 2:03 AM, C M <cmp...@gm...> wrote:
>
>> I have no idea what this is. If I create a certain plot first in an
>> application, it throws this error (edited to the key part):
>>
>> Traceback (most recent call last):
>>
>> File "thescript.py", line 2147, in AddPatchBar
>> ax.add_patch(patch)
>> File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1471, in
>> add_patch
>> self._update_patch_limits(p)
>> File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1492, in
>> _update_patch_limits
>> self.transData.inverted())
>> File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line
>> 1954, in inverted
>> return CompositeGenericTransform(self._b.inverted(),
>> self._a.inverted())
>> File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line
>> 1448, in inverted
>> self._inverted = Affine2D(inv(mtx))
>> File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 445,
>> in inv
>> return wrap(solve(a, identity(a.shape[0], dtype=a.dtype)))
>> File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 328,
>> in solve
>> raise LinAlgError, 'Singular matrix'
>> numpy.linalg.linalg.LinAlgError: Singular matrix
>>
>> But, the odd part is that if I create a completely different and totally
>> separate plot *before* this one, and *then* I try to plot this one, I do
>> not get this error and this plot shows fine. That makes no sense to me. Or
>> also, if I plot this "patch" on a plot with a few other lines plotted, it
>> also works.
>>
>> Does anyone have any idea what could be causing this? Thanks.
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> your
>> hub for all things parallel software development, from weekly thought
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>>
>>
>

What might be happening is that the patch being added has no area. The
logic it is failing in is in the autoscaling section, I believe. This is
why if there are other things already in the plot or with other patches,
then the code works fine because the limits aren't identical.
Still though, I thought we had enough logic checks to prevent this sort of
error. I see you are using Python 2.5, which is older than what we
currently support. Which version of matplotlib are you using?
Cheers!
Ben Root
On Wed, Dec 31, 2014 at 2:03 AM, C M <cmp...@gm...> wrote:
> I have no idea what this is. If I create a certain plot first in an
> application, it throws this error (edited to the key part):
>
> Traceback (most recent call last):
>
> File "thescript.py", line 2147, in AddPatchBar
> ax.add_patch(patch)
> File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1471, in
> add_patch
> self._update_patch_limits(p)
> File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1492, in
> _update_patch_limits
> self.transData.inverted())
> File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line
> 1954, in inverted
> return CompositeGenericTransform(self._b.inverted(),
> self._a.inverted())
> File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line
> 1448, in inverted
> self._inverted = Affine2D(inv(mtx))
> File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 445,
> in inv
> return wrap(solve(a, identity(a.shape[0], dtype=a.dtype)))
> File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 328,
> in solve
> raise LinAlgError, 'Singular matrix'
> numpy.linalg.linalg.LinAlgError: Singular matrix
>
> But, the odd part is that if I create a completely different and totally
> separate plot *before* this one, and *then* I try to plot this one, I do
> not get this error and this plot shows fine. That makes no sense to me. Or
> also, if I plot this "patch" on a plot with a few other lines plotted, it
> also works.
>
> Does anyone have any idea what could be causing this? Thanks.
>
>
>
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming! The Go Parallel Website,
> sponsored by Intel and developed in partnership with Slashdot Media, is
> your
> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a
> look and join the conversation now. http://goparallel.sourceforge.net
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>

I have no idea what this is. If I create a certain plot first in an
application, it throws this error (edited to the key part):
Traceback (most recent call last):
 File "thescript.py", line 2147, in AddPatchBar
 ax.add_patch(patch)
 File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1471, in
add_patch
 self._update_patch_limits(p)
 File "C:\Python25\lib\site-packages\matplotlib\axes.py", line 1492, in
_update_patch_limits
 self.transData.inverted())
 File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line 1954,
in inverted
 return CompositeGenericTransform(self._b.inverted(), self._a.inverted())
 File "C:\Python25\lib\site-packages\matplotlib\transforms.py", line 1448,
in inverted
 self._inverted = Affine2D(inv(mtx))
 File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 445, in
inv
 return wrap(solve(a, identity(a.shape[0], dtype=a.dtype)))
 File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line 328, in
solve
 raise LinAlgError, 'Singular matrix'
numpy.linalg.linalg.LinAlgError: Singular matrix
But, the odd part is that if I create a completely different and totally
separate plot *before* this one, and *then* I try to plot this one, I do
not get this error and this plot shows fine. That makes no sense to me. Or
also, if I plot this "patch" on a plot with a few other lines plotted, it
also works.
Does anyone have any idea what could be causing this? Thanks.