怎麼用python繪制柱狀圖_Python——使用matplotlib繪制柱狀圖

Python——使用matplotlib繪制柱狀圖

1、基本柱狀圖

首先要安裝matplotlib（matplotlib.org/api/pyplot_…） 可以使用pip指令直接安裝

# -*- 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、設定顔色

# -*- 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、設定标簽

# -*- 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、并列柱狀圖

# -*- 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= x+ 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()