20170408 mofan pandas：code lesson 06

import pandas as pd
import numpy as np
import os
print(os.getcwd())


print(‘**生成DataFrame****************‘)

#concatenating
df1 = pd.DataFrame(np.ones((3,4))*0,columns=[‘a‘,‘b‘,‘c‘,‘d‘])
df2 = pd.DataFrame(np.ones((3,4))*0,columns=[‘a‘,‘b‘,‘c‘,‘d‘])
df3 = pd.DataFrame(np.ones((3,4))*0,columns=[‘a‘,‘b‘,‘c‘,‘d‘])

print(df1,‘\n‘,df2,‘\n‘,df3)

res = pd.concat([df1,df2,df3],axis=0)
print(res)

res2 = pd.concat([df1,df2,df3],axis=1)
print(res2)
print(‘**记住合并后的方向，axis={0,1}****************‘)