Python实现绘制双柱状图并显示数值功能示例

# -*- coding:utf-8 -*-
#! python3
import matplotlib.pyplot as plt
import mpl_toolkits.mplot3d
#定义函数来显示柱状上的数值
def autolabel(rects):
 for rect in rects:
  height = rect.get_height()
  plt.text(rect.get_x()+rect.get_width()/2.-0.2, 1.03*height, '%s' % float(height))
if __name__ == '__main__': 
 l1=[68, 96, 85, 86, 76,87, 95]
 l2=[85, 68, 79, 89, 94, 82,90]
 name=['A','B','C','D','E','F','E']
 total_width, n = 0.8, 2
 width = total_width / n
 x=[0,1,2,3,4,5,6]
 plt.rc('font', family='SimHei', size=12)#设置中文显示，否则出现乱码！
 a=plt.bar(x, l1, width=width, label='数学',fc = 'y') 
 for i in range(len(x)):
  x[i] = x[i] + width
 b=plt.bar(x, l2, width=width, label='语文',tick_label = name,fc = 'r')
 autolabel(a)
 autolabel(b)
 plt.xlabel('学生')
 plt.ylabel('成绩')
 plt. ('学生成绩')
 plt.legend()
 plt.show()