Python 使用 Matplotlib 做图时,如何画竖直和水平的分割线?

时间:2017-09-06 14:39:46   收藏:0   阅读:4904
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链接:https://www.zhihu.com/question/21929761/answer/164975814
来源:知乎
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可以使用:

vlines(x, ymin, ymax)

hlines(y, xmin, xmax)

import matplotlib.pyplot as plt
import numpy as np


def Laplacian_Prior(x, u, b):
    
    return 1.0/(2*b)*np.exp(-abs(x - u)/b)

if __name__ == "__main__":
    
    x = np.arange(-10, 10, 0.01)
    y_1 = Laplacian_Prior(x, 0, 1)
    y_2 = Laplacian_Prior(x, 0, 2)
    y_3 = Laplacian_Prior(x, 0, 4)
    y_4 = Laplacian_Prior(x, -5, 4)
    plt.plot(x, y_1, "r-")
    plt.plot(x, y_2, "k-")
    plt.plot(x, y_3, "b-")
    plt.plot(x, y_4, "g-")
    plt.vlines(0, 0, 0.5, colors = "c", linestyles = "dashed")


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