matplotlib库疑难问题---1、解决中文乱码问题

matplotlib库疑难问题---1、解决中文乱码问题

一、总结

一句话总结：

plt.rcParams["font.sans-serif"]=["SimHei"] # 设置matplotlib库字体的非衬线字体为黑体

plt.rcParams["font.family"]="sans-serif" # 设置matplotlib库字体族为非衬线字体

# matplotlib解决中文乱码：
# 设置matplotlib库字体的非衬线字体为黑体
plt.rcParams["font.sans-serif"]=["SimHei"]
# 设置matplotlib库字体族为非衬线字体
plt.rcParams["font.family"]="sans-serif"

 

1、matplotlib库解决坐标轴负号无法显示问题？

plt.rcParams['axes.unicode_minus'] =False # 坐标轴负号不显示的时候用来显示负号

 

 

 

二、内容在总结中

博客对应课程的视频位置：1、解决中文乱码问题-范仁义-读书编程笔记
https://fanrenyi.com/video/43/371

 

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(-1,2,20)
y1 = np.e**x-10
y2 = x**5-4
plt.plot(x, y1, 'b-', label='第一条线') 
plt.plot(x, y2, 'r--', label='第二条线') 
plt.title('随便画的两条线') 
plt.xlabel(u'横坐标')
plt.ylabel(u'纵坐标')
plt.legend() 
plt.show()

D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 38543 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 20415 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 30011 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 30340 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 20004 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 26465 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 32447 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 27178 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 22352 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 26631 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 27178 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 22352 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 26631 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 32437 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 32437 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 38543 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 20415 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 30011 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 30340 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 20004 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 26465 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 32447 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 31532 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 19968 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:211: RuntimeWarning: Glyph 20108 missing from current font.
  font.set_text(s, 0.0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 31532 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 19968 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\software\coding\python_software\Anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 20108 missing from current font.
  font.set_text(s, 0, flags=flags)

配置matplotlib库的动态配置，设置字体以解决中文乱码问题

In [2]:

# matplotlib解决中文乱码：
# 设置matplotlib库字体的非衬线字体为黑体
plt.rcParams["font.sans-serif"]=["SimHei"]
# 设置matplotlib库字体族为非衬线字体
plt.rcParams["font.family"]="sans-serif"

# matplotlib解决负号无法显示：
# 坐标轴负号不显示的时候用来显示负号
plt.rcParams['axes.unicode_minus'] =False

x = np.linspace(-1,2,20)
y1 = np.e**x-10
y2 = x**5-4
plt.plot(x, y1, 'b-', label='第一条线') 
plt.plot(x, y2, 'r--', label='第二条线') 
plt.title('随便画的两条线') 
plt.xlabel(u'横坐标')
plt.ylabel(u'纵坐标')
plt.legend() 
plt.show()

In [ ]:

 

 

本系列博客对应课程位置：
1、解决中文乱码问题-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/371
2、将曲线平滑-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/372
3、matplotlib绘图核心原理-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/373
4、画动态图-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/374
5、保存动态图-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/375
6、显示图片-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/376

7、去掉刻度和边框-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/383

8、几个点画曲线-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/384

9、画箭头（综合实例）-1-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/391

9、画箭头（综合实例）-2-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/392

10、画直方图-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/393

11、画动态直方图-范仁义-读书编程笔记
https://www.fanrenyi.com/video/43/394