Re: [Matplotlib-users] Incompatibility with axvspan and legend on a semilog plot

That is indeed a bug.  This has now been fixed in SVN r8288.  You can 
apply this patch to your local copy if you aren't running from SVN:

http://matplotlib.svn.sourceforge.net/viewvc/matplotlib?view=rev&revision=8288

Mike

On 04/28/2010 09:29 PM, Shrividya Ravi wrote:
> Hi all,
> I am having a problem having both a vspan and a legend in a figure 
> plotted on a semilog axis. A simple code that gives the following 
> error is shown in red:
>
> ERROR
>
>     return self.frozen().__array__()
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1051, in __array__
>     return self.frozen().__array__()
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1706, in frozen
>     return blended_transform_factory(self._x.frozen(), self._y.frozen())
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1875, in frozen
>     frozen = composite_transform_factory(self._a.frozen(), 
> self._b.frozen())
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1367, in frozen
>     return Affine2D(self.get_matrix().copy())
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1451, in __init__
>     Affine2DBase.__init__(self)
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 1304, in __init__
>     Transform.__init__(self)
>   File "/usr/lib/pymodules/python2.6/matplotlib/transforms.py", line 
> 87, in __init__
>     self._parents = WeakKeyDictionary()
>   File "/usr/lib/python2.6/weakref.py", line 232, in __init__
>     def remove(k, selfref=ref(self)):
> RuntimeError: maximum recursion depth exceeded while calling a Python 
> object
>
> CODE
>
> x = numpy.arange(10,1e8,1000)
> y = numpy.arange(0,100,0.001)
>
> pylab.semilogx(x,y,'bo', label="Plot 1")
>
> pylab.legend(loc='best')
> pylab.axvspan(20,2e3,facecolor='k',alpha0.2)
>
>
>
>
>
>
>
> ------------------------------------------------------------------------------
>    
>
>
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