[R] How to transform the data frame into the list?

[arun]

Use ?split()
split(dat[,-4], dat$Year_Month) #dat is the dataset.

A.K.


   Country  Product   Price  Year_Month
     AE         1           20    201204
     DE         1           20    201204
     CN         1           28    201204
     AE         2           28    201204
     DE         2           28    201204
     CN         2           22    201204
     AE         3           28    201204
     CN         3           28    201204
     AE         1           20    201205
     DE         1           20    201205
     CN         1           28    201205
     AE         2           28    201205
     DE         2           28    201205

How to create the list? which has:
[[201204]]
  Country  Product   Price  
     AE         1           20    
     DE         1           20  
     CN         1           28    
     AE         2           28    
     DE         2           28    
     CN         2           22    
     AE         3           28  
     CN         3           28    

[[201205]]
  Country  Product   Price  
     AE         1           20  
     DE         1           20  
     CN         1           28    
     AE         2           28    
     DE         2           28