matplotlib - 柱形图 、散点图

提示:仅供我的舍友学习使用。


第1关:“大胃王”比赛数据柱形图绘制

代码如下(示例):

# -*- coding: utf-8 -*-
import pandas as pd
from matplotlib import pyplot as plt

hot_dog = pd.read_csv(r"matplotlib_bar/csv/hot-dog-contest-winners.csv")

def plot(): 
    # ********* Begin *********#
    fig, ax = plt.subplots() #subplots返回画布和子图  
    ax.bar(hot_dog["Year"],hot_dog["Dogs eaten"]) #绘制柱形图,第一个参数为x轴变量,第二个参数为y轴变量  
    plt.show()  #显示图像  

    # ********* End *********#
    plt.savefig('matplotlib_bar/studentfile/studentanswer/level_1/US.png')
    plt.close()

第2关:

代码如下(示例):

# -*- coding: utf-8 -*-
import pandas as pd
from matplotlib import pyplot as plt

hot_dog = pd.read_csv(r"matplotlib_bar/csv/hot-dog-contest-winners.csv")

def plot(): 
    # ********* Begin *********#
    ig,ax=plt.subplots()
    ax.bar(hot_dog["Year"],hot_dog["Dogs eaten"],width=[0.6],color=unitedStatesColor()) #添加指定的宽度  
    plt.show()
    ax.set_xlabel("Year")  #设置x轴标签  
    ax.set_ylabel("Dogs Eaten")  #设置y轴标签  
    ax.set_title("Hotdog game scores 1980-2010") #设置标题  
    ax.set_xlim(1979,2011)  #设置x轴数据限值  
    plt.rcParams['figure.figsize'] = (8.0, 4.0) #设置figure_size尺寸    

    # ********* End *********#
    plt.savefig('matplotlib_bar/studentfile/studentanswer/level_2/US.png')
    plt.close()
    plt.savefig('matplotlib_bar/studentfile/studentanswer/level_2/hotdog.png') 
    #保存png文件 

def unitedStatesColor():
    # ********* Begin *********
    #"打破记录的年份显示为粉红色,其余年份为灰绿色"  

    list=[]  
    for i in hot_dog["New record"]:  
        if 'country'=='United States':  
            list.append("#DB7093")  
        else:  
            list.append("#5F9F9F") 
    return list  

    # ********* End *********#

1:犯罪率数据散点图

代码如下(示例):

# -*- coding: utf-8 -*-
import pandas as pd #用于生成满足绘图要求的数据格式
from matplotlib import pyplot as plt #用于绘制散点图
#import statsmodels.api as sm #用于局部加权回归
from matplotlib.backends.backend_pdf import PdfPages
crime=pd.read_csv(r"matplotlibScatter/csv/crimeRatesByState2005.csv")
def plot():
    # ********* Begin *********#
    fig,ax=plt.subplots() #subplots返回画布和子图  
    crime2=crime[~crime['state'].isin(['District of Columbia','United States'])] 
    ax.plot(crime2["murder"],crime2["burglary"],"*",color="#00CC88") 
    ax.set_xlabel("crime murder", fontsize=12)  #设置x轴标签  
    ax.set_ylabel("crime burglary", fontsize=12) 
    ax.set_xlim(0,10) #x轴范围从0到10  
    ax.set_ylim(0,1200) 
    plt.show()
    # ********* End *********#
    plt.savefig('matplotlibScatter/studentanswer/level_1/crime.png') #保存为png格式
    plt.close() #关闭画布窗口

2:

代码如下(示例):

# -*- coding: utf-8 -*-
import pandas as pd #用于生成满足绘图要求的数据格式
from matplotlib import pyplot as plt#用于绘制散点图
import statsmodels.api as sm #用于局部加权回归

crime=pd.read_csv(r"matplotlibScatter/csv/crimeRatesByState2005.csv") #返回值为二维标记数据结构 DataFrame
def plot():
    # ********* Begin *********#
    fig,ax=plt.subplots() #subplots返回画布和子图  
    crime2=crime[~crime['state'].isin(['District of Columbia','United States'])] #获取没有全美平均值和华盛顿特区的犯罪率数据  
    ax.plot(crime2["murder"],crime2["burglary"],"*",color="#00CC88") 
    ax.set_xlabel("crime murder", fontsize=12)  #设置x轴标签  
    ax.set_ylabel("crime burglary", fontsize=12) 
    ax.set_xlim(0,10) #x轴范围从0到10  
    ax.set_ylim(0,1200) 
    plt.show()

    # ********* End *********#
    plt.savefig('matplotlibScatter/studentanswer/level_2/crime.png') #保存为png格式
    plt.close() #关闭画布窗口


开始你的任务吧,祝你成功!

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