matplotlib之画中画--在图中画子图

'''
Author: 365JHWZGo
Description: 画中画
Date: 2021/11/5 20:21
FilePath: day1105-4.py
'''

首先第一步是画出外边的plot，效果图如图片所示

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(1,10,10)
y = x + np.random.randint(-5,5,10)

#method1:use figure
fig = plt.figure()
left,bottom,width,height = 0.1,0.1,0.8,0.8
#left,bottom,width,height都是占整个figure坐标系的百分比
ax1 = fig.add_axes([left,bottom,width,height])
ax1.plot(x,y,'r')
ax1.set_xlabel('x')
ax1.set_ylabel('y')
ax1.set_title('figure outside')

plt.show()

# step2:
# could use fig.add_axes()
ax2 = fig.add_axes([0.2, 0.6, 0.25, 0.25])
ax2.plot(y, x, 'b')
ax2.set_xlabel('subplot1 x axis')
ax2.set_ylabel('subplot1 y axis')
ax2.set_title('subplot1')

# also could use plt.axes()
plt.axes([0.6, 0.2, 0.25, 0.25])
plt.plot(y[::-1], x, 'y')
plt.xlabel('subplot2 x axis')
plt.ylabel('subplot2 y axis')
plt.title('subplot2')