matplotlib python module using the image of the painting inverse trigonometric functions

Recently busy writing papers, not updated for a long time, a little time today to share with you a script about their use matplotlib module trigonometric painting image, photograph image generated is a function of

talk is  cheap,now,show the code

 1 # -*- coding:utf-8 -*-
 2 from matplotlib import pyplot as plt
 3 import numpy as np
 4 # 创建16:9矩形框，像素300dpi
 5 plt.figure(figsize = (16,9), dpi = 300)
 6 plt.subplot(111)
 7 
 8 x = np.linspace(-10, 10, 256, endpoint=True)
 9 y = np.arctan(x)
10 y = (2/np.pi) * y
11 plt.plot(x, y, color='blue', linewidth=2.0, linestyle='-')
12 
13  # Set the X-axis range 
14 plt.xlim (-10,10 )
 15  # is provided an X-axis scale marks, from -10 to 10, 21 to take values 
16 plt.xticks (np.linspace (-10,10,21, = Endpoint True))
 . 17  
18 is  # sets the y-axis range 
. 19 plt.ylim (-1,1 )
 20 is  # sets the y-axis scale scale from -1 to 1, 5 values taken 
21 is plt.yticks (np.linspace (- 1,1,5, Endpoint = True))
 22 is  
23 is plt.show ()