Python figure参数及subplot子图绘制代码

脚本专栏 2024/12/27 佚名

3 2 1

1. Python的figure参数主要有：

def figure(num=None, # autoincrement if None, else integer from 1-N
      figsize=None, # defaults to rc figure.figsize
      dpi=None, # defaults to rc figure.dpi
      facecolor=None, # defaults to rc figure.facecolor
      edgecolor=None, # defaults to rc figure.edgecolor
      frameon=True,
      FigureClass=Figure,
      clear=False,
      **kwargs
      ):

可以设置图片大小、分辨率、颜色等。

2. subplot子图绘制，子图的绘图参数可以分别设置

plt.figure(1)

x1 = np.linspace(-0.2, 2, 10)
y1 = x1**2 + 0.3
plt.subplot(121)
plt.scatter(x1, y1)
plt.xlabel('X')
plt.ylabel('Y')
plt.title('test_1')

x2 = np.linspace(-0.2, 2, 10)
y2 = x2 + 0.3
plt.subplot(122)
plt.plot(x2, y2, color="red", linewidth=1.0, marker = 's', linestyle="--")
## plt.plot(x, y, color="#ef5492", linewidth=2.0, marker = 's', linestyle="--")
# plt.plot(x2, y2, 'rs--')
     
plt.xlabel('X')
plt.ylabel('Y')
plt.title('test_2')
plt.show()

3. 在同一张图片上显示多种图形，简单说把 plt.show()放在最后即可

import matplotlib.pyplot as plt
import numpy as np
plt.figure(2)

x1 = np.linspace(-0.2, 2, 10)
y1 = x1**2 + 0.3
plt.scatter(x1, y1)


x2 = np.linspace(-0.2, 2, 10)
y2 = x2 + 0.3
plt.plot(x2, y2, color="red", linewidth=1.0, marker = 's', linestyle="--")
## plt.plot(x, y, color="#ef5492", linewidth=2.0, marker = 's', linestyle="--")
# plt.plot(x2, y2, 'rs--')
     
plt.xlabel('X')
plt.ylabel('Y')
plt.title('test_3')
plt.show()