【问题标题】:matplotlib: use fill_between to make coloured trianglesmatplotlib:使用 fill_between 制作彩色三角形
【发布时间】:2016-01-22 02:52:03
【问题描述】:

我用下面的代码在空间中绘制了随机三角形,但我想用颜色填充三角形。我知道 matplotlib 中的 fill_between() 函数,但是我不确定如何在下面的示例中实现它

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()

这给了

【问题讨论】:

    标签: python matplotlib


    【解决方案1】:

    您可以按如下方式使用plt.fill()

    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

    【讨论】:

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