Python——使用matplotlib繪制柱狀圖

1、基本柱狀圖

          首先要安裝matplotlib（http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.plot） 可以使用pip命令直接安裝

# -*- 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、設置顏色

          

# -*- 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、設置標簽

# -*- 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、堆疊柱狀圖

# -*- 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、並列柱狀圖

# -*- 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[i] = x[i] + width
plt.bar(x, num_list1, width=width, label='girl',tick_label = name_list,fc = 'r')
plt.legend()
plt.show()

 

6、條形柱狀圖

# -*- 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()