pyplot　绘图与可视化

#!/usr/bin/env python
# coding=utf-8

import matplotlib.pyplot as plt
from numpy.random import randn

# example 1
fig = plt.figure()
ax1 = fig.add_subplot(221)
ax2 = fig.add_subplot(222)

ax1.plot(randn(100).cumsum(),‘r--‘)
ax2.hist(randn(100),bins=20,color=‘g‘,alpha=0.3)

plt.show()

# example 2
fig,axes = plt.subplots(2,2)
for i in range(2):
    for j in range(2):
        axes[i,j].hist(randn(50),bins=20,color=‘b‘,alpha=.5)

plt.show()