matplotlib的二维作图代码

简单附上matplotlib的二维作图代码：

import math
import matplotlib.pyplot as plt
import numpy as np
# plt.grid(axis=‘x‘,c=‘g‘)
# if __name__==‘_main_‘:
x=[float(i) for i in range(1,300)]
y=[math.log(i) for i in x]
plt.plot(x,y,c=‘r‘, linewidth=3, label=‘log Curve‘)
a=[x[20],x[175]]
b=[y[20],y[175]]
plt.plot(a,b,‘g-‘,linewidth=2)
plt.plot(a, b, ‘b‘, marker=‘*‘,markersize=15,alpha=0.75)
plt.legend(loc=‘upper left‘)
plt.grid()
plt.xlabel(‘x‘)
plt.ylabel(‘log(x)‘)
plt.show()
plt.show()

matplotlib的二维作图代码

原文：https://www.cnblogs.com/tangjunjun/p/10854423.html