Python——使用matplotlib绘制柱状图
1、基本柱状图
首先要安装matplotlib 可以使用pip命令直接安装
[python] view plain copy
# -*- 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
[python] view plain copy
# -*- 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()
[cpp] view plain copy
# -*- 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
[python] view plain copy
# -*- 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
首先,dataframe自带的柱状图,可以将每列作为一个图例
import pandas as pd
data=pd.read_excel()
data.bar()