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urogers opened this issue May 6, 2019 · 7 comments · Fixed by #14151
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Saving polar plots with MiKTeX on Windows fails for some file formats #14146

urogers opened this issue May 6, 2019 · 7 comments · Fixed by #14151
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backend: pdf backend: svg status: confirmed bug topic: polar topic: text/usetex
Milestone
v3.2.0

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@urogers
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urogers commented May 6, 2019 •
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Bug summary

Saving matplotlib polar plots on Windows 7 and Windows 10, with MiKTex 2.9.7.000, fails for some formats (e.g., pdf, svg) and works for others (e.g., png, jpg)

Code for reproduction

import matplotlib.pyplot as plt
import matplotlib as mpl
mpl.rcParams['text.usetex'] = True

plt.figure()
ax = plt.subplot(111, polar=True)


plt.savefig('foo.png')  # Works
plt.savefig('foo.jpg')  # Works
plt.savefig('foo.tif')  # Works
# plt.savefig('foo.pdf')  # Fails
# plt.savefig('foo.svg')  # Fails
plt.show()

Actual outcome

"Error saving .... " window pops up with error code b'tcss1000' for pdf, and b'tcss3583' for svg. (The numbers change)

Matplotlib version

  • Operating system: Windows 7 & 10
  • Matplotlib version: 2.2.2 or 3.0.3
  • Matplotlib backend (print(matplotlib.get_backend())): Qt5Agg
  • Python version: 3.6
  • Jupyter version (if applicable): N/A
  • Other libraries: N/A

Installed via Anaconda3
@urogers urogers changed the title Saving polar plots with MiKTex on Windows Fails for some formats Saving polar plots with MiKTeX on Windows fails for some file formats May 6, 2019
@QuLogic
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QuLogic commented May 6, 2019

Matplotlib version: 2.2.2

This version is fairly old; please try with 3.0.2.

@ImportanceOfBeingErnest
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I can reproduce this with master branch, windows 8.1 and miktex 2.9.6630.

It bisects to #11381

@ImportanceOfBeingErnest ImportanceOfBeingErnest added this to the v3.2.0 milestone May 6, 2019
@anntzer
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anntzer commented May 7, 2019 •
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Looks like a duplicate of #10272 (try installing the cm-super tex package)?
(It may make sense to switch from computer modern to latin modern at some point, which at least has the advantage that we can check for its existence with \usepackage{lmodern}.)

@anntzer anntzer mentioned this issue May 7, 2019
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@ImportanceOfBeingErnest
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Installing cm-super solves this for pdf output, but not for svg. In the svg case I get

D:\****\lib\site-packages\matplotlib\textpath.py:349: UserWarning: The glyph (176) of font  
(D:/***/MiKTeX/fonts/type1/public/cm-super/sfss3583.pfb) cannot be converted with the encoding.  
Glyph may be wrong   
 "be wrong" % (glyph, font.fname))

And the output is a svg file without the ° symbols.

I think the main point here, in contrast to #10272 is, that a standard empty plot should not fail for standard latex installations.

@anntzer
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anntzer commented May 7, 2019

Looks like if you zoom a lot, you'll see a tiny degree sign, which suggests to me that the problem is the same as the one described in #12928?

@ImportanceOfBeingErnest
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Yes, with current master, the warning reads

The glyph 176 of font D:/****/MiKTeX/fonts/type1/public/cm-super/sfss3583.pfb cannot be converted with the encoding; glyph may be wrong.

@anntzer
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anntzer commented May 7, 2019

The warning is actually spurious (per #14156), but the sizing problem is real.

@anntzer anntzer mentioned this issue May 7, 2019
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@anntzer anntzer mentioned this issue Mar 26, 2020
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Labels
backend: pdf backend: svg status: confirmed bug topic: polar topic: text/usetex
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v3.2.0
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Clarify error with usetex when cm-super is not installed. anntzer/matplotlib
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@QuLogic @anntzer @ImportanceOfBeingErnest @urogers