Python学习-Platplotlib-1

import matplotlib.pyplot as plt
import numpy as np


x = np.linspace(0, 2*np.pi)
y = np.sin(x)

plt.figure(figsize = (9, 6))
plt.plot(x, y)
plt.plot(x, np.cos(x))
plt.plot(x, np.sin(x) + np.cos(x))

plt.legend(["sin(x)", "cos(x)", "sin(x) + cos(x)"], fontsize= 15,
           loc = "center",ncol = 3, bbox_to_anchor = (0,1,1,0.1))