如何使用pyplot填充阶梯曲线下的区域? [英] How to fill area under step curve using pyplot?

问题描述

我已使用pyplot.step()绘制了两条阶梯曲线，我想在这些曲线下方的区域进行阴影处理(最好使用透明阴影). pyplot.fill_between()假定为线性插值，而我想查看步骤插值，如下所示:

I have plotted two step curves using pyplot.step(), and I would like to shade in the area beneath these curves (ideally with transparent shading). pyplot.fill_between() assumes linear interpolation, whereas I want to see step interpolation, as displayed below:

如何在这些曲线下方的区域中着色?透明的颜色会很棒，因为这样可以清楚地显示这些曲线重叠的位置.

How can I shade in the region beneath these curves? Transparent coloring would be great, as this would make clear where these curves overlap.

推荐答案

您可以使用fill_between的alpha值使其半透明.

You can use the alpha value of the fill_between to make it semi-transparent.

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0,50,35)
y = np.random.exponential(1, len(x))
y2 = np.random.exponential(1, len(x))

plt.fill_between(x,y, step="pre", alpha=0.4)
plt.fill_between(x,y2, step="pre", alpha=0.4)

plt.plot(x,y, drawstyle="steps")
plt.plot(x,y2, drawstyle="steps")

plt.show()

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