how about split(inpfil, paste(inpfil[,1],inpfil[,2],sep=','))
Weidong Gu On Tue, Apr 3, 2012 at 6:42 PM, Ashish Agarwal <ashish.agarw...@gmail.com> wrote: > I have a dataframe imported from csv file below: > > Houseid,Personid,Tripid,taz > 1,1,1,4 > 1,1,2,7 > 2,1,1,96 > 2,1,2,4 > 2,1,3,2 > 2,2,1,58 > > There are three groups identified based on the combination of first and > second columns. How do I split this data frame? > > I tried > aa <- split(inpfil, inpfil[,1:2]) > but it has problems. > > Output desired is > > aa[1] > Houseid,Personid,Tripid,taz > 1,1,1,4 > 1,1,2,7 > aa[2] > Houseid,Personid,Tripid,taz > 2,1,1,96 > 2,1,2,4 > 2,1,3,2 > aa[3] > Houseid,Personid,Tripid,taz > 2,2,1,58 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
