如何在 y 轴的 x 轴上找到一个值？

Question

我有简单的代码。

import matplotlib.pyplot as plt
y = [0.85,0.50,0.27,0.15,0.10,0.05,0.03,0]
x = [0,50,100,150,200,280,300,400]
plt.style.use('seaborn-darkgrid')
plt.plot(x, y)

我想从图中了解 y 中 x 的值（例如：139）。

Answer 1

您可以使用scipy.interpolate.interp1d

from scipy.interpolate import interp1d
y = [0.85,0.50,0.27,0.15,0.10,0.05,0.03,0]
x = [0,50,100,150,200,280,300,400]
print(interp1d(x, y)(139)) # prints 0.1764