Closed
Description
Bug report
When making a plot using the 'classic' style, matplotlib overrides the default value for text.latex.unicode, setting it to False. This causes a problem for any plot that has negative numbers in any label, because matplotlib now uses a unicode symbol to represent the negative sign.
Code for reproduction
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import rcParams
rcParams['text.usetex'] = True
# Example data
t = np.arange(-1.0, 1.0 + 0.01, 0.01)
s = np.cos(4 * np.pi * t) + 2
plt.plot(t, s)
with plt.style.context('classic'):
plt.savefig('tex_demo')Actual outcome
The following traceback:
File "test_mpl.py", line 14, in <module>
plt.savefig('tex_demo')
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/pyplot.py", line 707, in savefig
res = fig.savefig(*args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/figure.py", line 1763, in savefig
self.canvas.print_figure(*args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/backend_bases.py", line 2234, in print_figure
**kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/backends/backend_agg.py", line 548, in print_png
FigureCanvasAgg.draw(self)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/backends/backend_agg.py", line 467, in draw
self.figure.draw(self.renderer)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/artist.py", line 68, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/figure.py", line 1240, in draw
renderer, self, artists, self.suppressComposite)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/image.py", line 139, in _draw_list_compositing_images
a.draw(renderer)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/artist.py", line 68, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/axes/_base.py", line 2386, in draw
mimage._draw_list_compositing_images(renderer, self, artists)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/image.py", line 139, in _draw_list_compositing_images
a.draw(renderer)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/artist.py", line 68, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/axis.py", line 1118, in draw
tick.draw(renderer)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/artist.py", line 68, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/axis.py", line 268, in draw
self.label1.draw(renderer)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/artist.py", line 68, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/text.py", line 797, in draw
mtext=mtext)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/backends/backend_agg.py", line 255, in draw_tex
Z = texmanager.get_grey(s, size, self.dpi)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/texmanager.py", line 585, in get_grey
pngfile = self.make_png(tex, fontsize, dpi)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/texmanager.py", line 508, in make_png
dvifile = self.make_dvi(tex, fontsize)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/texmanager.py", line 400, in make_dvi
texfile = self.make_tex(tex, fontsize)
File "/Users/goldbaum/Documents/matplotlib-git/lib/matplotlib/texmanager.py", line 311, in make_tex
if rcParams['text.latex.unicode']:
UnicodeEncodeError: 'ascii' codec can't encode character '\u2212' in position 298: ordinal not in range(128)
Expected outcome
The plot should be saved to disk without erroring. The script runs without error on matplotlib 1.5.3.
Matplotlib version
Matplotlib 2.0.0 on OSX, installed via pip.