python的绘图工具matplotlib使用实例

import matplotlib.pyplot as plt 
plt.bar(left = 0,height = 1)
plt.show()

#! coding: cp936
from pylab import *
# make a square figure and axes
figure(1, figsize=(6,6))
ax = axes([0.1, 0.1, 0.8, 0.8])
fracs = [45, 30, 25] #每一块占得比例，总和为100
explode=(0, 0, 0.08) #离开整体的距离，看效果
labels = 'Hogs', 'Dogs', 'Logs' #对应每一块的标志
pie(fracs, explode=explode, labels=labels,
 autopct='%1.1f%%', shadow=True, startangle=90, colors = ("g", "r", "y"))
 # startangle是开始的角度，默认为0，从这里开始按逆时针方向依次展开
title('Raining Hogs and Dogs') #标题
show()