如何在Matplotlib中编写自己的LaTeX导言？

Question

我正在尝试在我的LaTeX文档中插入matplotlib图形，并需要加粗的'i'和'j'符号，但不需要它们的点，取而代之的是帽子。我一直在使用代码\mathbf{\hat{\textnormal{\bfseries\i}}}，但由于这使用了amsmath包（或可能是amssymb包，抱歉我对LaTeX和matplotlib都很陌生），所以我不能在matplotlib标签中使用它。因此，我想知道如何在matplotlib中使用LaTeX，以及如何编写一个前导来安装使用这些符号所需的包。谢谢大家！编辑：我设法用这个代码进展到这里，但每当我运行代码时，我的python内核就会崩溃。不幸的是，我真的不理解我的代码或它出了什么问题，所以我上传了它，以防有所帮助。对于长时间的上传我感到抱歉。再次感谢您的帮助！

from mpl_toolkits.mplot3d import Axes3D
import numpy, matplotlib, matplotlib.pyplot as pyplot

matplotlib.rcParams['text.usetex'] = True
matplotlib.rcParams['text.latex.preamble'] = [
    r'\usepackage{amsmath}',
    r'\usepackage{amssymb}']
matplotlib.rcParams['font.family'] = 'serif'
matplotlib.rcParams['font.serif'] = 'Computer Modern'
matplotlib.verbose.level = 'debug-annoying'

Module_Colour = '#F0AE1E'

fig = pyplot.figure()
ax = fig.add_subplot(111, projection='3d')

X_arr = numpy.array([1.0,0.0,0.0])
Y_arr = numpy.array([0.0,1.0,0.0])
Z_arr = numpy.array([0.0,0.0,1.0])
O_arr = numpy.array([0.0,0.0,0.0])

pyplot.quiver(O_arr,O_arr,O_arr,X_arr,Y_arr,Z_arr,
              pivot='tail', length=1.0, linewidth=2.5,
              color = Module_Colour)

ax.set_xlabel('x-axis', fontsize=12.5)
ax.set_ylabel('y-axis', fontsize=12.5)
ax.set_zlabel('z-axis', fontsize=12.5)

ax.text(1.03, 0, 0, r'$\mathbf{\hat{\textnormal{\bfseries \i}}}$',
        fontsize=25, color = Module_Colour)
ax.text(0, 1.03, 0, r'$\mathbf{\hat{\textnormal{\bfseries \j}}}$',
        fontsize=25, color = Module_Colour)
ax.text(0, 0, 1.03, r'$\mathbf{\hat{\textnormal{\bfseries k}}}$',
        fontsize=25, color = Module_Colour)

ax.set_xlim3d([0, 1.05])
ax.set_ylim3d([0, 1.05])
ax.set_zlim3d([0, 1.13])
ax.view_init(elev=17.0, azim=44.0)

pyplot.savefig('file/pathway/figure.jpeg',
               bbox_inches='tight')
pyplot.show()

编辑

调试错误为：

FigureCanvasAgg.draw
RendererAgg.__init__
RendererAgg.__init__ width=800.0, height=600.0
RendererAgg.__init__ _RendererAgg done
RendererAgg.__init__ done
No LaTeX-compatible font found for the monospace font family in rcParams. Using default.
RendererAgg.points_to_pixels
No LaTeX-compatible font found for the monospace font family in rcParams. Using default.
C: && cd "C:\Users\alexd\.matplotlib\tex.cache" && latex -interaction=nonstopmode 8160df9e5349057f736eef7cf8779b4d.tex > "C:\Users\alexd\.matplotlib\tex.cache\8160df9e5349057f736eef7cf8779b4d.output"
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9.6100 64-bit)
entering extended mode
(8160df9e5349057f736eef7cf8779b4d.tex
LaTeX2e <2016/03/31> patch level 3
Babel <3.9r> and hyphenation patterns for 75 language(s) loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"))
("C:\Program Files\MiKTeX 2.9\tex\latex\type1cm\type1cm.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\psnfss\helvet.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\psnfss\courier.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\base\textcomp.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1enc.def"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsmath.sty"
For additional information on amsmath, use the `?' option.
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amstext.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsgen.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsbsy.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsopn.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsfonts\amssymb.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\amsfonts\amsfonts.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.sty"
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifpdf.sty")
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifvtex.sty")
("C:\Program Files\MiKTeX 2.9\tex\generic\ifxetex\ifxetex.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.cfg")

Package geometry Warning: Over-specification in `h'-direction.
    `width' (5058.9pt) is ignored.

Package geometry Warning: Over-specification in `v'-direction.
    `height' (5058.9pt) is ignored.

)
No file 8160df9e5349057f736eef7cf8779b4d.aux.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1cmr.fd")
*geometry* driver: auto-detecting
*geometry* detected driver: dvips
[1] (8160df9e5349057f736eef7cf8779b4d.aux) )
Output written on 8160df9e5349057f736eef7cf8779b4d.dvi (1 page, 240 bytes).
Transcript written on 8160df9e5349057f736eef7cf8779b4d.log.

Dvi: C:\Users\alexd\.matplotlib\tex.cache\8160df9e5349057f736eef7cf8779b4d.dvi
Dvi._xxx: encountered special: papersize=5203.43999pt,5203.43999pt
find_tex_file(cmr12.tfm): [u'kpsewhich', u'cmr12.tfm']
find_tex_file result: C:/Program Files/MiKTeX 2.9/fonts/tfm/public/cm/cmr12.tfm
opening tfm file C:/Program Files/MiKTeX 2.9/fonts/tfm/public/cm/cmr12.tfm
lh=18, bc=0, ec=127, nw=34, nh=16, nd=10
find_tex_file(cmr12.vf): [u'kpsewhich', u'cmr12.vf']
find_tex_file result:
RendererAgg.points_to_pixels
C: && cd "C:\Users\alexd\.matplotlib\tex.cache" && latex -interaction=nonstopmode 27047192dde3a3a7381bad7b27d0fcb3.tex > "C:\Users\alexd\.matplotlib\tex.cache\27047192dde3a3a7381bad7b27d0fcb3.output"
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9.6100 64-bit)
entering extended mode
(27047192dde3a3a7381bad7b27d0fcb3.tex
LaTeX2e <2016/03/31> patch level 3
Babel <3.9r> and hyphenation patterns for 75 language(s) loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"))
("C:\Program Files\MiKTeX 2.9\tex\latex\type1cm\type1cm.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\psnfss\helvet.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\psnfss\courier.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\base\textcomp.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1enc.def"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsmath.sty"
For additional information on amsmath, use the `?' option.
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amstext.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsgen.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsbsy.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsopn.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\amsfonts\amssymb.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\amsfonts\amsfonts.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.sty"
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifpdf.sty")
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifvtex.sty")
("C:\Program Files\MiKTeX 2.9\tex\generic\ifxetex\ifxetex.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.cfg")

Package geometry Warning: Over-specification in `h'-direction.
    `width' (5058.9pt) is ignored.


Package geometry Warning: Over-specification in `v'-direction.
    `height' (5058.9pt) is ignored.

)
No file 27047192dde3a3a7381bad7b27d0fcb3.aux.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1cmr.fd")
*geometry* driver: auto-detecting
*geometry* detected driver: dvips
[1] (27047192dde3a3a7381bad7b27d0fcb3.aux) )
Output written on 27047192dde3a3a7381bad7b27d0fcb3.dvi (1 page, 288 bytes).
Transcript written on 27047192dde3a3a7381bad7b27d0fcb3.log.

Dvi: C:\Users\alexd\.matplotlib\tex.cache\27047192dde3a3a7381bad7b27d0fcb3.dvi
Dvi._xxx: encountered special: papersize=5203.43999pt,5203.43999pt
find_tex_file(cmmi12.tfm): [u'kpsewhich', u'cmmi12.tfm']
find_tex_file result: C:/Program Files/MiKTeX 2.9/fonts/tfm/public/cm/cmmi12.tfm
opening tfm file C:/Program Files/MiKTeX 2.9/fonts/tfm/public/cm/cmmi12.tfm
lh=18, bc=0, ec=127, nw=97, nh=15, nd=9
find_tex_file(cmmi12.vf): [u'kpsewhich', u'cmmi12.vf']
find_tex_file result:
C: && cd "C:\Users\alexd\.matplotlib\tex.cache" && dvipng -bg Transparent -D 100.0 -T tight -o "da3e0f170d11553ae39831280c346c0f.png" "27047192dde3a3a7381bad7b27d0fcb3.dvi" > "C:\Users\alexd\.matplotlib\tex.cache\da3e0f170d11553ae39831280c346c0f.output"
This is dvipng 1.15 Copyright 2002-2015 Jan-Ake Larsson
[1]

然后python.exe停止响应，不幸的是我对技术不是很熟悉，所以很难理解为什么会发生这种情况。

- Aldahunter

---

请查看以下问题的答案：https://dev59.com/uHE85IYBdhLWcg3w8IQ4#20709149 - Serenity

嘿@Serenity，感谢您的帮助，我尝试使用那些行代码，但Python似乎总是崩溃。然而，@JimParker的代码（如下）似乎可以工作，但会出现错误！如果我看起来很笨拙（我可能确实如此），只是对LaTeX和Python（matplotlib）有非常基本的理解。 - Aldahunter

Answer 1

当我需要在matplotlib中使用LaTeX时，我将以下代码添加到Python脚本中（加上其他的调试信息命令）

 import matplotlib.pyplot as plt

 plt.rc('text', usetex=True)
 plt.rc('text.latex', preamble=r'\usepackage{amsmath}
          \usepackage{foo-name} `...')
 matplotlib.verbose.level = 'debug-annoying'

制作您的图表的命令

- Jim Parker

---

@AldaHunter 请看上面的编辑。我使用了<foo>而不是{foo}来表示可选包名。你收到的错误是LaTex版本的“文件未找到”。 - Jim Parker

@AldaHunter 我尝试运行你的代码，出现了两个错误。一个是在第19行出现了关键词pivot的问题。这是matplotlib早期版本的一个bug [https://github.com/matplotlib/matplotlib/issues/3907/]。我把它删除后，另一个错误出现了，即无法找到用于标记轴的不带点的字母"j"的字体。我将"j"改为"l"后，绘图正常工作了。对于标签问题，由于i、l和k不是常规的标记方案，我不确定如何修复。 - Jim Parker

如果您可以接受非粗体标签，则使用LaTeX字符串r'$\mathbf{\hat{j}}$'可行。 - Jim Parker

很抱歉，我不明白为什么我们无法获得任何调试信息。没有它，我束手无策。你可以尝试删除foo-file.txt和.fileo的行。这将导致输出默认到stdout，但如果之前没有生成任何内容，我很难有希望。等待更有经验的人发言。 - Jim Parker

@AldaHunter，很抱歉我已经不知道该如何给你建议了。调试信息中没有列出任何错误。最后一行说明dvipng正在尝试创建一个.png文件，并且日志可以在C：\ Users \ alexd \ .matplotlib \ tex.cache \ da3e0f170d11553ae39831280c346c0f.output找到。请尝试查看该文件以获取更多信息。 - Jim Parker

Answer 2

如果 @Jim Parker 的答案对您无效 - 就像我遇到同样的问题时发生的那样 - 我认为这将正常工作，因为上述方法会更改标准前言，但此方法将所需的软件包添加到前言中。

代码

plt.rcParams["text.latex.preamble"].join([
        r"\usepackage{dashbox}",              
        r"\setmainfont{xcolor}",
])

- George Nabil

---

实际上，这并没有为pyplot使用的前导添加任何内容。它只是创建了一个新字符串，并没有对其进行任何操作。您仍然需要使用新字符串调用plt.rc（...）来实际设置它。此外，如果有超过两个项目，它将会中断，因为它将在您指定的列表中的每对项目之间插入旧的前导。 - Fritz