Bug 850508 - transform in imshow doesn't work
transform in imshow doesn't work
Product: Fedora
Classification: Fedora
Component: python-matplotlib (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Jef Spaleta
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-08-21 13:07 EDT by Enrique
Modified: 2013-07-31 21:57 EDT (History)
5 users (show)

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Last Closed: 2013-07-31 21:57:20 EDT
Type: Bug
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Description Enrique 2012-08-21 13:07:58 EDT
Description of problem:

 I am using the imshow method with the transform option. In a simple test, I use the IdentityTransform() but the displayed image is not the same as if I don't give the transform option. Moreover, zooming doesn't work either.
 Here is the code snippet:

#!/usr/bin/env python
import numpy as np
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt
from matplotlib.figure import *
import matplotlib.transforms as mtransforms

fig = plt.figure()
plot = fig.add_subplot(111)
x = y = np.arange(-3.0, 3.0, 0.025)
X, Y = np.meshgrid(x, y)
Z = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)

wcs_transform = mtransforms.IdentityTransform()

im = plot.imshow(Z, interpolation='nearest',
                origin='lower', transform = wcs_transform)

 If the transform parameter in the imshow call is removed:
im = plot.imshow(Z, interpolation='nearest', origin='lower')

 then it works fine. The identity transformation of course shouldn't have any impact in the displayed axes.

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How reproducible:

Steps to Reproduce:
1. Execute the provided code snippet
Comment 1 Enrique 2012-08-21 13:13:58 EDT
Update: I have just tried with matplotlib 1.1.1 in Ubuntu 12.04 and it works fine, so probably the bug will go away if the latest version of matplotlib is packaged in Fedora.
Comment 2 Fedora End Of Life 2013-07-03 19:20:47 EDT
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