Python——使用matplotlib绘制柱状图
1、基本柱状图
          首先要安装matplotlib（http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.plot） 可以使用pip命令直接安装
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

num_list = [1.5,0.6,7.8,6]
plt.bar(range(len(num_list)), num_list)
plt.show()

2、设置颜色
         
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

num_list = [1.5,0.6,7.8,6]
plt.bar(range(len(num_list)), num_list,fc='r')
plt.show()

# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

num_list = [1.5,0.6,7.8,6]
plt.bar(range(len(num_list)), num_list,color='rgb')
plt.show()

3、设置标签
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

name_list = ['Monday','Tuesday','Friday','Sunday']
num_list = [1.5,0.6,7.8,6]
plt.bar(range(len(num_list)), num_list,color='rgb',tick_label=name_list)
plt.show()

4、堆叠柱状图
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

name_list = ['Monday','Tuesday','Friday','Sunday']
num_list = [1.5,0.6,7.8,6]
num_list1 = [1,2,3,1]
plt.bar(range(len(num_list)), num_list, label='boy',fc = 'y')
plt.bar(range(len(num_list)), num_list1, bottom=num_list, label='girl',tick_label = name_list,fc = 'r')
plt.legend()
plt.show()

5、并列柱状图
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

name_list = ['Monday','Tuesday','Friday','Sunday']
num_list = [1.5,0.6,7.8,6]
num_list1 = [1,2,3,1]
x =list(range(len(num_list)))
total_width, n = 0.8, 2
width = total_width / n

plt.bar(x, num_list, width=width, label='boy',fc = 'y')
for i in range(len(x)):
    x = x + width
plt.bar(x, num_list1, width=width, label='girl',tick_label = name_list,fc = 'r')
plt.legend()
plt.show()

6、条形柱状图
# -*- coding: utf-8 -*-
import matplotlib.pyplot as plt

name_list = ['Monday','Tuesday','Friday','Sunday']
num_list = [1.5,0.6,7.8,6]
plt.barh(range(len(num_list)), num_list,tick_label = name_list)
plt.show()