mapplotlib绘制饼状图

一 代码

1. import numpy as np
2. import matplotlib.pyplot as plt
3. #The slices will be ordered and plotted counter-clockwise.
4. labels ='Frogs','Hogs','Dogs','Logs'
5. sizes =[15,30,45,10]
6. colors =['yellowgreen','gold','#FF0000','lightcoral']
7. #使饼状图中第2片和第4片裂开
8. explode =(0,0.1,0,0.1)
9. fig = plt.figure()
10. ax = fig.gca()
11. ax.pie(np.random.random(4), explode=explode, labels=labels, colors=colors,
12. autopct='%1.1f%%', shadow=True, startangle=90,
13. radius=0.25, center=(0,0), frame=True)
14. ax.pie(np.random.random(4), explode=explode, labels=labels, colors=colors,
15. autopct='%1.1f%%', shadow=True, startangle=90,
16. radius=0.25, center=(1,1), frame=True)
17. ax.pie(np.random.random(4), explode=explode, labels=labels, colors=colors,
18. autopct='%1.1f%%', shadow=True, startangle=90,
19. radius=0.25, center=(0,1), frame=True)
20. ax.pie(np.random.random(4), explode=explode, labels=labels, colors=colors,
21. autopct='%1.1f%%', shadow=True, startangle=90,
22. radius=0.25, center=(1,0), frame=True)
23. #设置坐标轴刻度
24. ax.set_xticks([0,1])
25. ax.set_yticks([0,1])
26. #设置坐标轴刻度上显示的标签
27. ax.set_xticklabels(["Sunny","Cloudy"])
28. ax.set_yticklabels(["Dry","Rainy"])
29. #设置坐标轴跨度
30. ax.set_xlim((-0.5,1.5))
31. ax.set_ylim((-0.5,1.5))
32. #设置纵横比相等
33. ax.set_aspect('equal')
35. plt.show()

二 运行结果