如何填充由线连接的两组数据之间的区域？

Question

我有两组数据显示为图表中的线条。如何填充它们之间的颜色区域？import matplotlib.pyplot as pltcurve1, = plt.plot(xdata, ydata)curve2, = plt.plot(xdata, ydata)我试过：x = np.arange(0,12,0.01)plt.fill_between(x, curve1, curve2, color='yellow')谢谢

Answer 1

您必须将ydata用作 参数fill_between，而不是曲线。

要么ydata直接使用，要么从你的curve1/2对象中获取它们，比如ydata=curve1.get_ydata().

这是改编自文档的示例：

import matplotlib.pyplot as plt

import numpy as np

x = np.arange(-5, 5, 0.01)

y1 = -5*x*x + x + 10

y2 = 5*x*x + x

c1, = plt.plot(x, y1, color='black')

c2, = plt.plot(x, y2, color='black')

# If you want/have to get the data form the plots

# x = c1.get_xdata()

# y1 = c1.get_ydata()

# y2 = c2.get_ydata()

plt.fill_between(x, y1, y2, where=y2 >y1, facecolor='yellow', alpha=0.5)

plt.fill_between(x, y1, y2, where=y2 <=y1, facecolor='red', alpha=0.5)

plt.title('Fill Between')

plt.show()

最后你得到：