向繪制的直方圖添加圖例

Question

在繪制后，如何管理將標簽添加到直方圖？

import matplotlib.pyplot as plt
fig, ax1 = plt.subplots()
x = [2, 4, 6, 2, 4, 7, 6, 4, 4, 4, 4]

n, bins_edges, patches = ax1.hist(x, log=True, bins='doane', color="red")
binwidth =  bins_edges[1] - bins_edges[0]
mylabel = "Binwidth {}".format(binwidth)
ax1.hist[-1].set_label(mylabel)
plt.legend()
plt.show()

Answer 1

您可以通過將字符串傳遞給legend()來將字符串添加到圖例中

import matplotlib.pyplot as plt
fig, ax1 = plt.subplots()
x = [2, 4, 6, 2, 4, 7, 6, 4, 4, 4, 4]

n, bins_edges, patches = ax1.hist(x, log=True, bins='doane', color="red")
binwidth =  bins_edges[1] - bins_edges[0]
mylabel = "Binwidth {}".format(binwidth)


ax1.legend([mylabel])
plt.show()