subject:"\[R\] help on improving the efficiency of the codes"

Re: [R] help on improving the efficiency of the codes

2015-02-25 Thread Ivan Calandra

By the way, do not post the same topic twice, especially with different subject lines! It's counter-productive -- Ivan Calandra, ATER University of Reims Champagne-Ardenne GEGENAA - EA 3795 CREA - 2 esplanade Roland Garros 51100 Reims, France +33(0)3 26 77 36 89 ivan.calan...@univ-reims.fr https

[R] help on improving the efficiency of the codes

2015-02-25 Thread conglan

HI, I have the following large data set: the sample is as the following: Country Product Brand Year_Month DisplaySize OperationSystem AE 1 20201204 1 1 AE 5 20201204 1 1