我想使用乳胶的数字标签，但我得到的错误
运行时错误：LaTeX无法处理以下字符串：b 'lp'
以下是LaTeX生成的完整报告：
就是这样（我没有看到任何报告）
编辑：这是我得到的整个错误：

Traceback (most recent call last):
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_qt5agg.py", line 197, in __draw_idle_agg
    FigureCanvasAgg.draw(self)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 464, in draw
    self.figure.draw(self.renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\figure.py", line 1144, in draw
    renderer, self, dsu, self.suppressComposite)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 2426, in draw
    mimage._draw_list_compositing_images(renderer, self, dsu)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\image.py", line 139, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 63, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axis.py", line 1138, in draw
    renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axis.py", line 1078, in _get_tick_bboxes
    extent = tick.label1.get_window_extent(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 967, in get_window_extent
    bbox, info, descent = self._get_layout(self._renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 353, in _get_layout
    ismath=False)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 230, in get_text_width_height_descent
    renderer=self)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 676, in get_text_width_height_descent
    dvifile = self.make_dvi(tex, fontsize)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 423, in make_dvi
    report))
RuntimeError: LaTeX was not able to process the following string:
b'lp'
Here is the full report generated by LaTeX:

下面是我的代码：

import numpy as np
from matplotlib import rc
import matplotlib.pyplot as plt
plt.close('all')

rc('text', usetex = True)

mu = np.linspace(0,10,100)
eta = mu**2

fig, ax = plt.subplots()
ax.plot(mu,eta,label= r'$\eta (\mu)$')
ax.set_title('Test')
ax.legend()

• 我安装了MiKTeX，根据https://docs.alfresco.com/4.2/tasks/fot-addpath.html将其添加到环境变量中。
• 我检查了MiKTeX的软件包，在“\MiKTeX excecutables”类别中发现了“miktex-dvipng-bin-x64-2.9”。我推断我有一个dvipng。
• 我下载了Ghostcript，并将其添加到环境变量中。
• 我试着用texworks编译一个latex脚本到pdf，它工作得很好，从我推断LaTeX安装正确。
• 从https://matplotlib.org/1.4.1/users/usetex.html，这是所有我应该需要的...
• 我尝试删除我的.matplotlib/tex.cache目录
• 我试着写作

import matplotlib as mpl
mpl.rcParams['text.usetex']=True

而不是

from matplotlib import rc
rc('text', usetex = True)

但结果是一样的

• 斯维欣

rc('text', usetex = True)

到

rc('text', usetex = False)

防止错误，但我的标签不是用乳胶写的...
在谷歌上搜索了很多之后，我的想法很短。有人能帮助我吗？
我的配置是：

• Python 3.6（我在Spyder中运行代码）
• MiKTeX 2.9
• Ghostscript 9.50
• Windows 10
• 编辑：matplotlib 2.0.2
  编辑：升级到matplotlib 3.1.1，我得到以下错误：

Traceback (most recent call last):
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 304, in _run_checked_subprocess
    stderr=subprocess.STDOUT)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 336, in check_output
    **kwargs).stdout
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 403, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 209, in __init__
    super(SubprocessPopen, self).__init__(*args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 992, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] Le fichier spécifié est introuvable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_qt5.py", line 505, in _draw_idle
    self.draw()
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
    self.figure.draw(self.renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\figure.py", line 1709, in draw
    renderer, self, artists, self.suppressComposite)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\image.py", line 135, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 2607, in draw
    self._update_title_position(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 2556, in _update_title_position
    if title.get_window_extent(renderer).ymin < top:
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 890, in get_window_extent
    bbox, info, descent = self._get_layout(self._renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 291, in _get_layout
    ismath="TeX" if self.get_usetex() else False)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 201, in get_text_width_height_descent
    s, fontsize, renderer=self)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 448, in get_text_width_height_descent
    dvifile = self.make_dvi(tex, fontsize)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 338, in make_dvi
    texfile], tex)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 308, in _run_checked_subprocess
    'found'.format(command[0])) from exc
RuntimeError: Failed to process string with tex because latex could not be found
Traceback (most recent call last):
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 304, in _run_checked_subprocess
    stderr=subprocess.STDOUT)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 336, in check_output
    **kwargs).stdout
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 403, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 209, in __init__
    super(SubprocessPopen, self).__init__(*args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "C:\Users\Vincent\Anaconda3\lib\subprocess.py", line 992, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] Le fichier spécifié est introuvable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_qt5.py", line 505, in _draw_idle
    self.draw()
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
    self.figure.draw(self.renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\figure.py", line 1709, in draw
    renderer, self, artists, self.suppressComposite)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\image.py", line 135, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 2607, in draw
    self._update_title_position(renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 2556, in _update_title_position
    if title.get_window_extent(renderer).ymin < top:
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 890, in get_window_extent
    bbox, info, descent = self._get_layout(self._renderer)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\text.py", line 291, in _get_layout
    ismath="TeX" if self.get_usetex() else False)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py", line 201, in get_text_width_height_descent
    s, fontsize, renderer=self)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 448, in get_text_width_height_descent
    dvifile = self.make_dvi(tex, fontsize)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 338, in make_dvi
    texfile], tex)
  File "C:\Users\Vincent\Anaconda3\lib\site-packages\matplotlib\texmanager.py", line 308, in _run_checked_subprocess
    'found'.format(command[0])) from exc
RuntimeError: Failed to process string with tex because latex could not be found