[Python Study Notes]pandas.DataFrame.plot()函数绘图

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>>文件: pandas作图.py
>>作者: liu yang
>>博客： liuyang1.club
>>邮箱: liuyang0001@outlook.com
>>博客: www.cnblogs.com/liu66blog
 
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import sys, os
import matplotlib
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
# 定义要使用的字体,防止出现中文乱码
font=matplotlib.font_manager.FontProperties(fname=r"C:\Windows\Fonts\Deng.ttf")
 
def bar1():
    df=pd.DataFrame(
        {'Height':[166,167,177,120],
        'Age':[23,23,24,25],
        'Score':[80,100,67,60]
        },
        # 定义数据显示的顺序
        columns=['Height','Score','Age'],
        index=['liu','shi','song','ma']
    )
 
    # kind为画图类型,rot为旋转角度
    df_plot=df.plot(kind='bar',rot=0)
    # 设置标题头
    plt.title('学生信息',fontproperties=font)
    # 第一个参数为数据排序,loc设置图例位置
    plt.legend(df.columns,loc=1)
    plt.xlabel('姓名',fontproperties=font)
    plt.ylabel('',fontproperties=font)
    plt.xticks()
    plt.yticks([y for y in range(0,180,10)])
    for i in range(0,4):
        plt.text(i-0.18,df.get("Height")[i],'%.0f'%df.get("Height")[i], ha='center', va='bottom')
        plt.text(i,df.get("Score")[i],'%.0f'%df.get("Score")[i], ha='center', va='bottom')
        plt.text(i+0.15,df.get("Age")[i],'%.0f'%df.get("Age")[i], ha='center', va='bottom')
 
    # 显示
    plt.show()
 
if __name__ == '__main__':
    bar=bar1()