Python 如何在同一图表上绘制4个直方图

我有以下问题：
我正在matplotlib.pyplot中使用hist（）
我试图在同一个图表上创建4个直方图。每一个都是高斯近似。

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我如何在同一个图表上绘制4个直方图，而不使它们相互阻塞（并排）？有什么想法吗？

这本书中有几个例子。这一个似乎回答了你的问题：

import numpy as np
import pylab as P
#
# first create a single histogram
#
mu, sigma = 200, 25
x = mu + sigma*P.randn(10000)
#
# finally: make a multiple-histogram of data-sets with different length
#
x0 = mu + sigma*P.randn(10000)
x1 = mu + sigma*P.randn(7000)
x2 = mu + sigma*P.randn(3000)

# and exercise the weights option by arbitrarily giving the first half
# of each series only half the weight of the others:

w0 = np.ones_like(x0)
w0[:len(x0)/2] = 0.5
w1 = np.ones_like(x1)
w1[:len(x1)/2] = 0.5
w2 = np.ones_like(x2)
w0[:len(x2)/2] = 0.5



P.figure()

n, bins, patches = P.hist( [x0,x1,x2], 10, weights=[w0, w1, w2], histtype='bar')

P.show()