matplotlib：使用fill_between来制作彩色三角形

Question

我已经用下面的代码在空间绘制了随机三角形，但是我想用颜色填充三角形。我知道在matplotlib的fill_between()功能，但我不知道如何实现它在下面的例子中

import matplotlib.pyplot as plt 

trianglex = [ 1, 10, 7, 1 ] #repeated last coordinates so that the last coordinate joins the first coordinate to form the outline of the triangle 
triangley = [ 2, 8, 4, 2 ] 

triangle2x = [ 13, 25, 21, 13] 
triangle2y = [ 5, 7 , 14, 5 ] 


plt.figure('Triangles') 
for i in range(3): 
    plt.plot(trianglex, triangley, 'o-') 

for i in range(3): 
    plt.plot(triangle2x, triangle2y, 'o-') 

plt.show() 

这给

Answer 1

你可以使用plt.fill()如下：

import matplotlib.pyplot as plt 

trianglex = [ 1, 10, 7, 1 ] 
triangley = [ 2, 8, 4, 2 ]  
triangle2x = [ 13, 25, 21, 13] 
triangle2y = [ 5, 7 , 14, 5 ] 

plt.figure('Triangles') 
for i in range(3): 
    plt.plot(trianglex, triangley, 'o-') 
plt.fill(trianglex, triangley) 

for i in range(3): 
    plt.plot(triangle2x, triangle2y, 'o-') 
plt.fill(triangle2x, triangle2y) 

plt.show() 

输出