e.g. a= a b c d e 1 1 1 3 1 1 2 1 2 3 4 5 3 1 3 3 8 3 4 1 4 3 3 5 5 1 1 3 1 1 I want to delete colume a and colume c, because they have the same values in every row, then ,I want to get this data.frame .
b= b d e 1 1 1 1 2 2 4 5 3 3 8 3 4 4 3 5 5 1 1 1 the following is my code but it's wrong. rm(list=ls()) a=c(1,1,1,1,1); b=c(1,2,3,4,1); c=c(3,3,3,3,3); d=c(1,4,8,3,1); e=c(1,5,3,5,1) data.f=data.frame(a,b,c,d,e) origin.data<-data.f dim.frame=dim(data.f) rn=dim.frame[1] n<-0 for (k in 1:(dim.frame[2]-n)) {if (data.f[1,k]==data.f[rn,k]) {data.f<-data.f[,-k] n<-n+1 k<-k-1 } } origin.data data.f how can i modify it and obtain my wanted result. thank you! -- View this message in context: http://old.nabble.com/how-can-I-delete-those-columes-with-the-same-element-in-every-row--tp26227873p26227873.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.