Python：（使用matplotlib画图）使用bar画柱状图 并标注数字

如图所示

代码如下

import matplotlib.pyplot as pltimport numpy as npn = 12X = np.arange(n)Y1 = (1 - X/float(n)) * np.random.uniform(0.5,1.0,n)Y2 = (1 - X/float(n)) * np.random.uniform(0.5,1.0,n)# plt.bar(X,+Y1,facecolor='#9999ff',edgecolor='white')# plt.bar(X,-Y2,facecolor='#ff9999',edgecolor='white')plt.bar(X,+Y1)plt.bar(X,-Y2)for x,y in zip(X,Y1):plt.text(x+0.05,y+0.05,'%.2f' %y, ha='center',va='bottom')for x, y in zip(X, Y2):plt.text(x+0.05,-y-0.15,'%.2f'%y, ha='center',va='bottom')plt.xlim(-.5,n)plt.xticks(())plt.ylim(-1.25,1.25)plt.yticks(())

注：内容仅供学习参考，资源来自莫烦