pyplot 绘图与可视化

1. 基本使用

#!/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()