python 无衬线数学与 matplotlib 中的乳胶
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Sans-serif math with latex in matplotlib
提问by astrofrog
The following script:
以下脚本：
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as mpl
mpl.rc('font', family='sans-serif')
mpl.rc('text', usetex=True)
fig = mpl.figure()
ax = fig.add_subplot(1,1,1)
ax.text(0.2,0.5,r"Math font: 1^\circ$")
ax.text(0.2,0.7,r"Normal font (except for degree symbol): 451$^\circ$")
fig.savefig('test.png')
is an attempt to use a sans-serif font in matplotlib with LaTeX. The issue is that the math font is still a serif font (as indicated by the axis numbers, and as demonstrated by the labels in the center). Is there a way to set the math font to also be sans-serif?
是尝试在 matplotlib 和 LaTeX 中使用无衬线字体。问题是数学字体仍然是衬线字体（如轴号所示，以及中心标签所示）。有没有办法将数学字体设置为无衬线字体？
回答by Paul H
I always have text.usetex = Truein my matplotlibrc file. In addition to that, I use this as well:
text.usetex = True我的 matplotlibrc 文件中总是有。除此之外，我也使用它：
mpl.rcParams['text.latex.preamble'] = [
r'\usepackage{siunitx}', # i need upright \micro symbols, but you need...
r'\sisetup{detect-all}', # ...this to force siunitx to actually use your fonts
r'\usepackage{helvet}', # set the normal font here
r'\usepackage{sansmath}', # load up the sansmath so that math -> helvet
r'\sansmath' # <- tricky! -- gotta actually tell tex to use!
]
Hope that helps.
希望有帮助。
回答by Vyacheslav
The easiest way is to use matplotlib's internal TeX, e.g.:
最简单的方法是使用 matplotlib 的内部 TeX，例如：
import pylab as plt
params = {'text.usetex': False, 'mathtext.fontset': 'stixsans'}
plt.rcParams.update(params)
If you use an external LaTeX, you can use, e.g., CM Bright fonts:
如果您使用外部 LaTeX，则可以使用例如 CM Bright 字体：
params = {'text.usetex': True,
'text.latex.preamble': [r'\usepackage{cmbright}', r'\usepackage{amsmath}']}
plt.rcParams.update(params)
Note, that the CM Bright font is non-scalable, and you'll not be able to save PDF/PS! Same with other options with external LaTeX I've found so far.
请注意，CM Bright 字体是不可缩放的，您将无法保存 PDF/PS！与迄今为止我发现的外部 LaTeX 的其他选项相同。
回答by nedim
This will enable you to use the Computer Modern Sans font if you, as I, prefer it over Helvetica:
如果你像我一样喜欢它而不是 Helvetica，这将使你能够使用 Computer Modern Sans 字体：
mpl.rcParams['text.usetex'] = True
mpl.rcParams['text.latex.preamble'] = [r'\usepackage[cm]{sfmath}']
mpl.rcParams['font.family'] = 'sans-serif'
mpl.rcParams['font.sans-serif'] = 'cm'
