error in hexbin normalization

Community matplotlib-users
#1

Hello,

Quick note. I'm making plots with hexbin and everything works correctly until I try to use the norm='Normalize' option at which point I get:

Traceback (most recent call last):
   File "diff_engine_v2tmp.py", line 731, in <module>
     kept_and_discards)
   File "diff_engine_v2tmp.py", line 605, in main
     plt.hexbin(xdat,ydat,cmap=cm.jet,gridsize=25,norm=Normalize' )
   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pyplot.py", line 1920, in hexbin
     ret = gca().hexbin(*args, **kwargs)
   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py", line 5452, in hexbin
     collection.autoscale_None()
   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/cm.py", line 148, in autoscale_None
     self.norm.autoscale_None(self._A)
AttributeError: 'int' object has no attribute 'autoscale_None'

I assume this a bug of some sort.

Thanks for any ideas.

Mike

Using:
  os-x 10.5.6
  python 2.5.4 from macports
  matplotlib 0.98.5.2 from macports

#2

Mike Bauer wrote:

Hello,

Quick note. I'm making plots with hexbin and everything works correctly until I try to use the norm='Normalize' option at which point I get:

Traceback (most recent call last):
   File "diff_engine_v2tmp.py", line 731, in <module>
     kept_and_discards)
   File "diff_engine_v2tmp.py", line 605, in main
     plt.hexbin(xdat,ydat,cmap=cm.jet,gridsize=25,norm=Normalize' )

What is that single quote mark doing after Normalize? If we ignore it, then it looks like you are passing a class, not a class instance as the kwarg needs.

   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/ lib/python2.5/site-packages/matplotlib/pyplot.py", line 1920, in hexbin
     ret = gca().hexbin(*args, **kwargs)
   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/ lib/python2.5/site-packages/matplotlib/axes.py", line 5452, in hexbin
     collection.autoscale_None()
   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/ lib/python2.5/site-packages/matplotlib/cm.py", line 148, in autoscale_None
     self.norm.autoscale_None(self._A)
AttributeError: 'int' object has no attribute 'autoscale_None'

This part of the traceback is also a little puzzling; I'm not sure why self.norm is an int at this point.

I assume this a bug of some sort.

No, I think the problem is that you are passing a class instead of an instance of a class as the norm kwarg to hexbin. (It is not completely clear to me from the traceback, however--there is that strange single quote mark.) What kind of normalization are you trying to to? In other words, what are you trying to accomplish by specifying the norm kwarg?

Eric

···

Thanks for any ideas.

Mike

Using:
  os-x 10.5.6
  python 2.5.4 from macports
  matplotlib 0.98.5.2 from macports

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