06-matplotlib-饼状图

 import numpy as np

 import matplotlib.pyplot as plt

 '''

     饼状图显示一个数据系列中各项总和的比例；

     饼状图中的数据点显示为整个饼状图的百分比；

     如：前十大品牌占市场份额图

 '''

 # 例

 labels = 'A','B','C','D'

 fracs = [15.0,30.0,45.0,10.0]

 explode = [0,0.05,0,0.08]

 plt.axes(aspect=1)

 plt.pie(x=fracs,labels=labels,autopct="%.0f%%",explode=explode,shadow=True)

 plt.show()

 # 练习

 labels = 'SH','BJ','SZ','GZ'

 fracs = [20,30,25,15]

 explode = [0,0,0.08,0]

 plt.pie(x= fracs,labels=labels,autopct='%.00f%%',explode=explode,shadow=True)

 plt.show()