matplotlib 中文字体 汉字

matplotlib 中文字体测试

wget https://zihao-openmmlab.obs.cn-east-3.myhuaweicloud.com/20220716-mmclassification/dataset/SimHei.ttf

# /home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/matplotlib/mpl-data/fonts/ttf

findfont: Font family ['SimHei'] not found. Falling back to DejaVu Sans.
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 20013 (\N{CJK UNIFIED IDEOGRAPH-4E2D}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 25991 (\N{CJK UNIFIED IDEOGRAPH-6587}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 23383 (\N{CJK UNIFIED IDEOGRAPH-5B57}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 20307 (\N{CJK UNIFIED IDEOGRAPH-4F53}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 27979 (\N{CJK UNIFIED IDEOGRAPH-6D4B}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 35797 (\N{CJK UNIFIED IDEOGRAPH-8BD5}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)
findfont: Font family ['SimHei'] not found. Falling back to DejaVu Sans.
findfont: Font family ['SimHei'] not found. Falling back to DejaVu Sans.
/home/software/anaconda3/envs/tf115/lib/python3.7/site-packages/IPython/core/pylabtools.py:151: UserWarning: Glyph 36724 (\N{CJK UNIFIED IDEOGRAPH-8F74}) missing from current font.
  fig.canvas.print_figure(bytes_io, **kw)

原因：

字体文件放置的位置不对。

解决方法：

(1) 字体文件的位置：

../anaconda3/envs/yolov5/lib/python3.7/site-packages/matplotlib/mpl-data/fonts/ttf/

 （2）清除缓存

import matplotlib.pyplot as plt
%matplotlib inline

print(matplotlib.get_cachedir())

rm -rf /root/.cache/matplotlib

（3）重启kernel

（4）

import matplotlib.pyplot as plt
%matplotlib inline

import matplotlib
import matplotlib.pyplot as plt
%matplotlib inline
print(matplotlib.get_cachedir())
matplotlib.rc("font",family='SimHei') # 中文字体
plt.rcParams['axes.unicode_minus']=False  # 用来正常显示负号

plt.plot([1,2,3], [100,500,300])
plt.title('matplotlib中文字体测试', fontsize=25)
plt.xlabel('X轴', fontsize=15)
plt.ylabel('Y轴', fontsize=15)
plt.show()

 ====================================================

一、方法一

修改局部字体样式，在需要显示中文的地方增加 fontproperties 属性。

    import matplotlib.pyplot as plt
    plt.plot([1, 2, 3, 4])
    plt.title('自定义标题名称', fontproperties='SimHei')
    plt.show()

二、方法二

修改全局字体样式，需要使用 matplotlib 模块的 rcParams

    import matplotlib.pyplot as plt
     
    #####################################
    from matplotlib import rcParams
    rcParams['font.family'] = 'SimHei'
    #####################################
     
    plt.plot([1, 2, 3, 4])
    plt.title('自定义标题名称')
    plt.show()

三、方法三

在代码中插入以下三行代码

    from pylab import *
    mpl.rcParams['font.sans-serif']=['SimHei']
    mpl.rcParams['axes.unicode_minus']=False

链接：https://blog.csdn.net/hfy1237/article/details/128218567

======================================================

可以直接从window系统中找到（C:/windows/Fonts），复制即可

常用中文字体

    宋体：SimSun

    黑体：SimHei

    微软雅黑：Microsoft YaHei

    微软正黑体：Microsoft JhengHei

    新宋体：NSimSun

    新细明体：PMingLiU

    细明体：MingLiU

    标楷体：DFKai-SB

    仿宋：FangSong

    楷体：KaiTi

    隶书：LiSu

    幼圆：YouYuan

    华文细黑：STXihei

    华文楷体：STKaiti

    华文宋体：STSong

    华文中宋：STZhongsong

    华文仿宋：STFangsong

    方正舒体：FZShuTi

    方正姚体：FZYaoti

    华文彩云：STCaiyun

    华文琥珀：STHupo

    华文隶书：STLiti

    华文行楷：STXingkai

    华文新魏：STXinwei

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REF

https://blog.csdn.net/hfy1237/article/details/128218567

https://blog.csdn.net/lemonbit/article/details/121433603

https://blog.csdn.net/BIT_666/article/details/122365074