mac-处理处理及画图的基本步骤

处理处理及画图的基本步骤：

from matplotlib import pyplot as plt
import pandas as pd

data2=pd.read_csv('/Users/ligaijiang/Pyexample/Plt/countries.csv')

China_filter=data2.country=='China'
China_data=data2[China_filter]


US_filter=data2.country=='United States'
US_data=data2[US_filter]


JP_filter=data2.country=='Japan'
JP_data=data2[JP_filter]


#print(China_data)
#print(US_data)
#print(JP_data)


plt.plot(China_data.year,China_data.population)
plt.plot(US_data.year,US_data.population)
plt.plot(JP_data.year,JP_data.population)

plt.xlabel('Year')
plt.ylabel('Population')
plt.title('Country Population')
plt.legend(['China','Us','Jp'])

plt.show()