Incompatibility with axvspan and legend on a semilog plot

Community matplotlib-users
1

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)

2

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:

Mike

···

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

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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