[Python] RuntimeError: Failed to process string with tex because latex could not be found

I was trying to render text with LaTeX in Matplotlib. There is a demo provided by Matplotlib at https://matplotlib.org/3.1.1/gallery/text_labels_and_annotations/tex_demo.html.

However, when I ran this demo, I got this error saying "RuntimeError: Failed to process string with tex because latex could not be found", but I'm sure I have installed Miktex and Ghostscript required by Matlibplot.

Anyone knows how should I solve it? Thanks.

import numpy as np
import matplotlib
matplotlib.rcParams['text.usetex'] = True
import matplotlib.pyplot as plt


t = np.linspace(0.0, 1.0, 100)
s = np.cos(4 * np.pi * t) + 2

fig, ax = plt.subplots(figsize=(6, 4), tight_layout=True)
ax.plot(t, s)

ax.set_xlabel(r'\textbf{time (s)}')
ax.set_ylabel('\\textit{Velocity (\N{DEGREE SIGN}/sec)}', fontsize=16)
ax.set_title(r'\TeX\ is Number $\displaystyle\sum_{n=1}^\infty'
r'\frac{-e^{i\pi}}{2^n}$!', fontsize=16, color='r')
plt.show()


Here is the error trace back:

Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 304, in _run_checked_subprocess
stderr=subprocess.STDOUT)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 336, in check_output
**kwargs).stdout
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 403, in run
with Popen(*popenargs, **kwargs) as process:
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 997, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The System Cannot Find the File Specified
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\tkinter\__init__.py", line 746, in callit
func(*args)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\_backend_tk.py", line 338, in idle_draw
self.draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
super(FigureCanvasTkAgg, self).draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
self.figure.draw(self.renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 1702, in draw
**self._tight_parameters)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 2476, in tight_layout
pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 362, in get_tight_layout_figure
pad=pad, h_pad=h_pad, w_pad=w_pad)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 111, in auto_adjust_subplotpars
tight_bbox_raw = union([ax.get_tightbbox(renderer) for ax in subplots
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 112, in <listcomp>
if ax.get_visible()])
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axes\_base.py", line 4355, in get_tightbbox
bb_xaxis = self.xaxis.get_tightbbox(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1164, in get_tightbbox
self._update_label_position(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 2014, in _update_label_position
bboxes, bboxes2 = self._get_tick_boxes_siblings(renderer=renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1999, in _get_tick_boxes_siblings
tlb, tlb2 = axx.xaxis._get_tick_bboxes(ticks_to_draw, renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in _get_tick_bboxes
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in <listcomp>
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 890, in get_window_extent
bbox, info, descent = self._get_layout(self._renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 291, in _get_layout
ismath="TeX" if self.get_usetex() else False)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 201, in get_text_width_height_descent
s, fontsize, renderer=self)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 448, in get_text_width_height_descent
dvifile = self.make_dvi(tex, fontsize)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 338, in make_dvi
texfile], tex)
File "C:\Users\haiqing\Anaconda3\envs\mie324\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
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 304, in _run_checked_subprocess
stderr=subprocess.STDOUT)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 336, in check_output
**kwargs).stdout
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 403, in run
with Popen(*popenargs, **kwargs) as process:
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 997, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The System Cannot Find the File Specified
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\_backend_tk.py", line 259, in resize
self.draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
super(FigureCanvasTkAgg, self).draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
self.figure.draw(self.renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 1702, in draw
**self._tight_parameters)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 2476, in tight_layout
pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 362, in get_tight_layout_figure
pad=pad, h_pad=h_pad, w_pad=w_pad)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 111, in auto_adjust_subplotpars
tight_bbox_raw = union([ax.get_tightbbox(renderer) for ax in subplots
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 112, in <listcomp>
if ax.get_visible()])
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axes\_base.py", line 4355, in get_tightbbox
bb_xaxis = self.xaxis.get_tightbbox(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1164, in get_tightbbox
self._update_label_position(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 2014, in _update_label_position
bboxes, bboxes2 = self._get_tick_boxes_siblings(renderer=renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1999, in _get_tick_boxes_siblings
tlb, tlb2 = axx.xaxis._get_tick_bboxes(ticks_to_draw, renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in _get_tick_bboxes
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in <listcomp>
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 890, in get_window_extent
bbox, info, descent = self._get_layout(self._renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 291, in _get_layout
ismath="TeX" if self.get_usetex() else False)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 201, in get_text_width_height_descent
s, fontsize, renderer=self)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 448, in get_text_width_height_descent
dvifile = self.make_dvi(tex, fontsize)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 338, in make_dvi
texfile], tex)
File "C:\Users\haiqing\Anaconda3\envs\mie324\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
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 304, in _run_checked_subprocess
stderr=subprocess.STDOUT)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 336, in check_output
**kwargs).stdout
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 403, in run
with Popen(*popenargs, **kwargs) as process:
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\subprocess.py", line 997, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The System Cannot Find the File Specified

Traceback (most recent call last):
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\tkinter\__init__.py", line 746, in callit
func(*args)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\_backend_tk.py", line 338, in idle_draw
self.draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
super(FigureCanvasTkAgg, self).draw()
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
self.figure.draw(self.renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 1702, in draw
**self._tight_parameters)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\figure.py", line 2476, in tight_layout
pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 362, in get_tight_layout_figure
pad=pad, h_pad=h_pad, w_pad=w_pad)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 111, in auto_adjust_subplotpars
tight_bbox_raw = union([ax.get_tightbbox(renderer) for ax in subplots
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\tight_layout.py", line 112, in <listcomp>
if ax.get_visible()])
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axes\_base.py", line 4355, in get_tightbbox
bb_xaxis = self.xaxis.get_tightbbox(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1164, in get_tightbbox
self._update_label_position(renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 2014, in _update_label_position
bboxes, bboxes2 = self._get_tick_boxes_siblings(renderer=renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1999, in _get_tick_boxes_siblings
tlb, tlb2 = axx.xaxis._get_tick_bboxes(ticks_to_draw, renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in _get_tick_bboxes
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\axis.py", line 1150, in <listcomp>
for tick in ticks if tick.label1.get_visible()],
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 890, in get_window_extent
bbox, info, descent = self._get_layout(self._renderer)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\text.py", line 291, in _get_layout
ismath="TeX" if self.get_usetex() else False)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\backends\backend_agg.py", line 201, in get_text_width_height_descent
s, fontsize, renderer=self)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 448, in get_text_width_height_descent
dvifile = self.make_dvi(tex, fontsize)
File "C:\Users\haiqing\Anaconda3\envs\mie324\lib\site-packages\matplotlib\texmanager.py", line 338, in make_dvi
texfile], tex)
File "C:\Users\haiqing\Anaconda3\envs\mie324\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

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