柱形图

用线性数据画柱状图
 1 plt.figure()
 2 xvals = range(len(linear_data))
 3 plt.bar(xvals, linear_data, width = 0.3)
 4 
 5 new_xvals = []
 6 
 7 # 创建new_xvals使横坐标向右移动0.3，用平方数据画红色的柱状图
 8 for item in xvals:
 9     new_xvals.append(item+0.3)
10 
11 plt.bar(new_xvals, exponential_data, width = 0.3 ,color='red')
12 
13 from random import randint
14 linear_err = [randint(0,15) for x in range(len(linear_data))] 
15 
16 # 用随机的误差值来画新的误差坐标
17 plt.bar(xvals, linear_data, width = 0.3, yerr=linear_err)

1 #堆积条形图
2 plt.figure()
3 xvals = range(len(linear_data))
4 plt.bar(xvals, linear_data, width = 0.3, color='b')
5 plt.bar(xvals, exponential_data, width = 0.3, bottom=linear_data, color='r')

1 # 水平的堆积条形图
2 plt.figure()
3 xvals = range(len(linear_data))
4 plt.barh(xvals, linear_data, height = 0.3, color='b')
5 plt.barh(xvals, exponential_data, height = 0.3, left=linear_data, color='r')