透明的“重叠” matplotlib堆栈图

Question

我有一个简单的堆栈图：

import matplotlib.pyplot as plt

label, color = ["R", "M"], ["green", "blue"]
X = [x for x in range(101)]
Y1 =  [31.4*x for x in range(101)]
Y2 = [26.51*x-250 if (26.51*x-250)>=0 else 0 for x in range(101)]
Y3 =  [31.4*x if 31.4*x < 2400 else 2400 for x in range(101)]

plt.stackplot(X, Y1, Y2, labels=label, colors = color)
plt.fill_between(X,Y3,[2400 for x in range(101)], color = 'r')
plt.legend(loc=2)
plt.xlim(0,100)
plt.ylim(0,5600)
plt.show()

也许有一种更好的方式来显示我想要显示的内容，但是我想知道，如果可能的话，如何使用matplotlib使红色区域透明。

Answer 1

如果我的理解正确，您是否需要以下类似内容？

在这种情况下，您可以指定fill_between

的透明度

import matplotlib.pyplot as plt

label, color = ["R", "M"], ["green", "blue"]
X = [x for x in range(101)]
Y1 =  [31.4*x for x in range(101)]
Y2 = [26.51*x-250 if (26.51*x-250)>=0 else 0 for x in range(101)]
Y3 =  [31.4*x if 31.4*x < 2400 else 2400 for x in range(101)]

plt.stackplot(X, Y1, Y2, labels=label, colors = color)
plt.fill_between(X,Y3,[2400 for x in range(101)], color = 'r', alpha=0.3)
plt.legend(loc=2)
plt.xlim(0,100)
plt.ylim(0,5600)