On Nov 15, 2011, at 11:02 AM, haohao Tsing wrote:
hi R,users Now I read a data from a txt file newdata<-read.table("1.txt") in the 1.txt ,there are several column shown as below 1 3 4 5 2 3 5 6 4 5 6 7 so when I want analysis the second column anadata<-newdata$V2but my question I can not use some certain variable to indice the column?e.g cmn=2 anadata<-newdata$Vcmn
Either:
anadata<-newdata[[ paste("V", cmn, sep="") ]]
Or:
anadata<-newdata[[cmn]]
how can I finish this command ?can anyone help me ? thank yo .
Your should go back and study your introductory manual now. If this is not near the begininning of that manual, you hsoulswitch manuals.
You should also type: ?"$"And read that page carefully and try all of the examples. It will probably take more than one reading to master its contents, but it is a core part of learning R.
-- David Winsemius, MD West Hartford, CT ______________________________________________ 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.
