corrupt pdf of histogram

Jouni_K_Seppanen · March 28, 2012, 6:27pm

sanders <sanders@...3329...> writes:

If keywords fill=False and log=True,

then after saving, the png looks fine but the histogram in the pdf is
mixed up.

Confirmed, thanks for the report. I filed this at

github.com/matplotlib/matplotlib

pdf backend bug with logarithmic plots

opened 06:27PM - 28 Mar 12 UTC

closed 08:20PM - 13 Apr 12 UTC

jkseppan

status: confirmed bug Release critical

Reported by "sanders" at http://thread.gmane.org/gmane.comp.python.matplotlib.ge…neral/30305 The second pdf file produced by the following script looks wrong, as if one corner of each histogram bar is shifted to the right. The png file looks correct, and so does the first pdf file (produced with log=False). ``` python import matplotlib.pyplot as plt import numpy as np data = np.random.normal(size=1000) ### correct pdf fig = plt.figure() ax = fig.add_subplot(111) ax.hist(data, fill=False, log=False) fig.savefig('plot1.pdf', format='pdf') fig.savefig('plot1.png', format='png') ### wrong pdf fig = plt.figure() ax = fig.add_subplot(111) ax.hist(data, fill=False, log=True) fig.savefig('plot2.pdf', format='pdf') fig.savefig('plot2.png', format='png') ```

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Jouni K. Sepp�nen

Benjamin_Root · April 5, 2012, 2:01am

I ran into something like this with filled plots originally saved as eps files and then converted into a pdf. Didn’t need log=True, though. The eps files were fine, but depending on how I converted (pstopdf or ps2pdf, I forget which) it would get messed up. I will double-check my comments I made in a Makefile about this to see if it might be related.

Ben Root

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On Wed, Mar 28, 2012 at 2:27 PM, Jouni K. Seppänen <jks@…83…397…> wrote:

sanders <sanders@…3329…> writes:

If keywords fill=False and log=True,

then after saving, the png looks fine but the histogram in the pdf is

mixed up.

Confirmed, thanks for the report. I filed this at

https://github.com/matplotlib/matplotlib/issues/804