Python——使用matplotlib绘制柱状图

落日映苍穹つ 2022-06-16 08:59 308阅读 0赞

# 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()

![20170511162135217][]

## 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()

![20170511162646005][]

# -*- 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()

![20170511162754741][]

## 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()

![20170511163432109][]

## 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()

![20170511164120691][]

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

![20170511170105631][]

## 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()

![20170511170421452][]

[20170511162135217]: /images/20220616/e3fbecddc8254c1eb61dca27482b7f21.png
[20170511162646005]: /images/20220616/7ab1a66f3b274512a8a1ed5736d40551.png
[20170511162754741]: /images/20220616/cb3535b856dd4b6292a9855dbd43327c.png
[20170511163432109]: /images/20220616/058d47e3f5fd454b9bcc595ba23f1339.png
[20170511164120691]: /images/20220616/3e87f3231846492dac633b4fe848960c.png
[20170511170105631]: /images/20220616/9b4ce0e1b6a44037af8be8d6242fbc9f.png
[20170511170421452]: /images/20220616/ce32ab8ca3664be7baabd2c7d4114428.png