GeezerVison is showing github.com — Superscripts in axis label cut when saving .eps with bbox_inches="tight" · Issue #7075 · matplotlib/matplotlib
Superscripts in axis label cut when saving .eps with bbox_inches="tight" #7075DescriptionI have been saving some .eps plots using:
matplotlib.pyplot.savefig(file.eps, bbox_inches="tight")
and this works as expected; however, when using:
matplotlib.rcParams['text.usetex'] = True
matplotlib.pyplot.savefig(file.eps, bbox_inches="tight")
the y axis label is cut.
It has been noted before that there has been some issues with .eps fies and usetex (Bounding box no longer works for EPS files if usetex=True #85) but I don't know in what way the bounding box was wrong and I am also using a matplotlib version that is 5 years on.
Here is a somewhat forced example and the results.
Example
import numpy
from matplotlib import pyplot
from matplotlib import gridspec
from matplotlib.collections import LineCollection
def plotLines(file_name):
# -- Misc ----------------------------------------------------------------
axis_font_size = 50.
line_thickness = 3.
# -- Data ----------------------------------------------------------------
angles = numpy.linspace(-180., 180, num=201)
amp_values = [1., 2., 3.]
line_values = []
for amp in reversed(amp_values):
sine = amp * (numpy.sin(angles * (numpy.pi/180.)))**-1
line_values.append(zip(angles, sine))
amp_values = numpy.array(amp_values)
lines = LineCollection(
line_values,
array=amp_values,
cmap=pyplot.cm.viridis,
linewidth=line_thickness
)
# -- Init Plot -----------------------------------------------------------
pyplot.clf() # Clear plot area
fig = pyplot.figure()
ax_grid = gridspec.GridSpec(
1, 2, wspace=0.05, hspace=0.00,
width_ratios=[20, 1]
)
# -- Plot ----------------------------------------------------------------
plot = pyplot.subplot(ax_grid[0])
plot.add_collection(lines)
# Axis limits
plot.set_xlim([numpy.min(angles), numpy.max(angles)])
plot.set_ylim([-numpy.max(amp_values), numpy.max(amp_values)])
# Axis labels
plot.set_xlabel(
"$\\mathrm{Angle} \\, \\left[^{\\circ}\\right]$",
fontsize=axis_font_size
)
plot.set_ylabel(
"$\\mathrm{Amp} \\,"
"\\times \\, \\left[\\mathrm{sine} \\,"
"\\left(\\mathrm{Angle}\\right)\\right]^{-1}$",
fontsize=axis_font_size,
)
# -- Colour Bar ----------------------------------------------------------
cbar_axis = pyplot.subplot(ax_grid[1])
cbar = pyplot.colorbar(lines, ticks=amp_values, cax=cbar_axis)
# CBar Label
cbar.ax.set_ylabel(
"$\\mathrm{Amp}$",
fontsize=axis_font_size,
)
# -- Save ----------------------------------------------------------------
pyplot.savefig(
"{:s}.eps".format(file_name),
bbox_inches="tight",
dpi=600
)
pyplot.close()
if __name__ == "__main__":
plotLines("Without")
import matplotlib as mpl
mpl.rcParams['text.usetex'] = True # Process all text with TeX
plotLines("With")
Results
Without
As expected
With
Y axis label cut
System
Matplotlib 1.5.1
Python 2.7.12 (Anaconda install)
CentOS Linux release 7.2.1511
GPL Ghostscript 9.07 (2013-02-14) Activityadded this to the This milestone has been deleted milestone on Sep 9, 2016tohojo commented on Feb 1, 2017 I've been having some issues with text bounding boxes being wrong for axis labels on 2.0 (when saving PDFs in my case). Will investigate if this is the same bug... tohojo commented on Feb 21, 2017 And to follow up on this, my issue is unrelated to usetex, so I don't think it's the same issue... modified the milestones: This milestone has been deleted, This milestone has been deleted on May 3, 2017modified the milestones: This milestone has been deleted, This milestone has been deleted on Oct 9, 2017Warbo commented on Jul 11, 2018 I was having trouble with y-axis labels being cut off: it was fine for pgf output, but broke when using EPS. Googling brought me here, so I tried removing 'usetex = True' and it solved the problem. pyZerrenner commented on Apr 30, 2019 For me this bug is DPI dependent. With the default DPI of 100 the following code gives a good result:
import matplotlib.pyplot as plt
plt.rcParams['figure.dpi'] = 100
fig, ax = plt.subplots(1, 1, figsize=(2,1))
ax.set_ylabel(r'$X^{SUPERSCRIPT}$')
fig.savefig('test_superscript.png', bbox_inches='tight', pad_inches=0)
However, when I increase the DPI, the superscript of the y-label is cut off. With plt.rcParams['figure.dpi'] = 300 the result is:
The same happens for saving as pdf or when setting 'savefig.dpi' instead of 'figure.dpi'. My current solution is to increase the value of pad_inches until everything is visible. This increases the padding on all sides, which is not too bad, but still annoying.
When using TeX for text rendering, the issue appears for all DPI, like in the comments above. With plt.rcParams['figure.dpi'] = 100 and plt.rcParams['text.usetex'] = True I get:
Maybe the DPI and TeX issues are somewhat unrelated, but I didn't want to open a new issue unnecessarily.
I am using matplotlib 2.2.4 on Python 3.6 myself. Unfortunately, I cannot verify this with the latest version (matplotlib 3.0.3) right now, so I hope this has not been resolved yet. (Or rather I do hope it has been resolved, then this issue could be closed.) jklymak commented on Apr 30, 2019 This is still a bug on master... Its obviously the superscript that is causing the problem, with the text bounding box not surrounding the superscript. jklymak commented on Apr 30, 2019 ... same thing happens for a title. changed the title [-]Axis label cut when saving .eps with bbox_inches="tight" but only when usetex=True[/-] [+]Superscripts in axis label cut when saving .eps with bbox_inches="tight"[/+] on Apr 30, 2019jklymak commented on Nov 16, 2021 I'll close this in favour of #21653, which is the same thing, but perhaps easier to follow (bug doesn't depend on clipping or eps, etc)
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