Corrupted percent signs in labels

Nikolaus_Rath · October 9, 2012, 8:32pm

Hello,

For some reason, my matplotlib isn't able to print percent signs ('%')
properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

print matplotlib.__version__
plt.plot(np.arange(10), np.arange(10)**2)
plt.xlabel('Percent [%]')
plt.savefig('mplbug.pdf')

[0] inspiron:~/tmp# python mplbug.py
1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the
percent sign becomes a triangle that partially covers the upper left
circle.

Known bug? Any workarounds that don't require upgrading (I'd like to
stick with the Debian package)?

Thanks,

-Nikolaus

mplbug.pdf (9.53 KB)

···

--
»Time flies like an arrow, fruit flies like a Banana.«

PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

Francesco_Montesano · October 9, 2012, 8:45pm

Hi

2012/10/9 Nikolaus Rath <Nikolaus@…120…3072…>

Hello,

For some reason, my matplotlib isn’t able to print percent signs (‘%’)

properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib

import matplotlib.pyplot as plt

import numpy as np

print matplotlib.version

plt.plot(np.arange(10), np.arange(10)**2)

plt.xlabel(‘Percent [%]’)

plt.savefig(‘mplbug.pdf’)

[0] inspiron:~/tmp# python mplbug.py

1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the

percent sign becomes a triangle that partially covers the upper left

circle.

Known bug? Any workarounds that don’t require upgrading (I’d like to

stick with the Debian package)?

confirmed for pdf and eps figures. For jpg and png, as well as the matplotlib window with TkAgg the percentage looks fine.

matplotlib version: 1.1.1 shipped with kubuntu 12.10

Francesco

···

Thanks,

-Nikolaus

–

»Time flies like an arrow, fruit flies like a Banana.«

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Da_id · October 9, 2012, 8:51pm

On Windows it works just fine. Just a wild guess, can you try to make
it a raw string?

plt.xlabel(r'Percent [%]')

···

On Tue, Oct 9, 2012 at 10:45 PM, Francesco Montesano <franz.bergesund@...287...> wrote:

Hi

2012/10/9 Nikolaus Rath <Nikolaus@...3072...>

Hello,

For some reason, my matplotlib isn't able to print percent signs ('%')
properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

print matplotlib.__version__
plt.plot(np.arange(10), np.arange(10)**2)
plt.xlabel('Percent [%]')
plt.savefig('mplbug.pdf')

[0] inspiron:~/tmp# python mplbug.py
1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the
percent sign becomes a triangle that partially covers the upper left
circle.

Known bug? Any workarounds that don't require upgrading (I'd like to
stick with the Debian package)?

confirmed for pdf and eps figures. For jpg and png, as well as the
matplotlib window with TkAgg the percentage looks fine.
matplotlib version: 1.1.1 shipped with kubuntu 12.10

Francesco

Thanks,

-Nikolaus

--
»Time flies like an arrow, fruit flies like a Banana.«

PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

------------------------------------------------------------------------------
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Damon_McDougall3 · October 9, 2012, 8:56pm

I'm using the AGG backend and saving to a png file without any
problems, but I'm using the current git master branch. I'll try to see
if I can recreate on 1.1.1rc2. Watch this space.

···

On Tue, Oct 9, 2012 at 10:32 PM, Nikolaus Rath <Nikolaus@...3072...> wrote:

Hello,

For some reason, my matplotlib isn't able to print percent signs ('%')
properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

print matplotlib.__version__
plt.plot(np.arange(10), np.arange(10)**2)
plt.xlabel('Percent [%]')
plt.savefig('mplbug.pdf')

[0] inspiron:~/tmp# python mplbug.py
1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the
percent sign becomes a triangle that partially covers the upper left
circle.

Known bug? Any workarounds that don't require upgrading (I'd like to
stick with the Debian package)?

Thanks,

-Nikolaus

--
»Time flies like an arrow, fruit flies like a Banana.«

PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

Damon_McDougall3 · October 9, 2012, 9:01pm

No dice. I still can't recreate your problem on OS X 10.7.4 with
matplotlib version 1.1.1-rc2.

What are your font/tex specifications in the matplotlib.rcParams dictionary?

···

On Tue, Oct 9, 2012 at 10:56 PM, Damon McDougall <damon.mcdougall@...287...> wrote:

On Tue, Oct 9, 2012 at 10:32 PM, Nikolaus Rath <Nikolaus@...3072...> wrote:

Hello,

For some reason, my matplotlib isn't able to print percent signs ('%')
properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

print matplotlib.__version__
plt.plot(np.arange(10), np.arange(10)**2)
plt.xlabel('Percent [%]')
plt.savefig('mplbug.pdf')

[0] inspiron:~/tmp# python mplbug.py
1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the
percent sign becomes a triangle that partially covers the upper left
circle.

Known bug? Any workarounds that don't require upgrading (I'd like to
stick with the Debian package)?

Thanks,

-Nikolaus

--
»Time flies like an arrow, fruit flies like a Banana.«

PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

I'm using the AGG backend and saving to a png file without any
problems, but I'm using the current git master branch. I'll try to see
if I can recreate on 1.1.1rc2. Watch this space.

--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

Michael_Droettboom1 · October 10, 2012, 12:23pm

It's a known bug, fixed since 1.1.1.

github.com/matplotlib/matplotlib

PDF renderer draws strange artifacts on '%' character in 1.1.1

opened 11:30AM - 07 Sep 12 UTC

closed 03:28PM - 10 Sep 12 UTC

eeaston

status: confirmed bug

Hi there, The following code: ``` python from matplotlib import use use("pdf"…) import matplotlib.pyplot as plt plt.title("Is there a bug?%%") plt.savefig("test.pdf") plt.close ``` ..produces a PDF with strange arrow artiacts overlaying the '%' characters. This i a regression since 1.1.0. Matplotlib version: 1.1.1 Backend: PDF Arch: x86_64 Python: 2.6.2 Thanks, Edward

BTW: If you're running the Debian package, how come the version is a release candidate? (1.1.1rc2)

Mike

···

On 10/09/2012 04:32 PM, Nikolaus Rath wrote:

Hello,

For some reason, my matplotlib isn't able to print percent signs ('%')
properly:

[1] inspiron:~/tmp# cat mplbug.py

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

print matplotlib.__version__
plt.plot(np.arange(10), np.arange(10)**2)
plt.xlabel('Percent [%]')
plt.savefig('mplbug.pdf')

[0] inspiron:~/tmp# python mplbug.py
1.1.1rc2

I have attached the resulting PDF. For some reason, the slash in the
percent sign becomes a triangle that partially covers the upper left
circle.

Known bug? Any workarounds that don't require upgrading (I'd like to
stick with the Debian package)?

Thanks,

-Nikolaus

------------------------------------------------------------------------------
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Deploy New Relic app performance management and know exactly
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Benjamin_Root · October 10, 2012, 12:53pm

Mike,

We didn’t get the final release of v1.1.1 out in time for the Debian Freeze back in the spring. Sandro Toshi could only get the rc2 into the repositories.

Ben Root

···

On Wed, Oct 10, 2012 at 8:23 AM, Michael Droettboom <mdroe@…86…> wrote:

It’s a known bug, fixed since 1.1.1.

  [https://github.com/matplotlib/matplotlib/issues/1211](https://github.com/matplotlib/matplotlib/issues/1211)



  BTW: If you're running the Debian package, how come the version is

a release candidate? (1.1.1rc2)

  Mike