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 plt

curve1, = 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 pltimport numpy as npx = np.arange(-5, 5, 0.01)y1 = -5*x*x + x + 10y2 = 5*x*x + xc1, = 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：