Folks: I consider my reply below rather clumsy: One has to keep track of index numbers other than that which is inserted and must separately change column names. Is there as "essentially better" way to do this, either via base R or via an R package. I leave it to you to define "essentially better."
Thanks. Cheers, Bert On Mon, Aug 1, 2011 at 10:17 AM, Bert Gunter <bgun...@gene.com> wrote: > Doesn't work -- you lose column names. > > Try this instead: > > yourframe[,30:51] <- cbind( newcolumn,yourframe[,30:50]) > > Adjust column names after via: > > names(yourframe) [30:51] <- c(newcolname,names(yourframe[30:50]) > > Cheers, > Bert > > On Mon, Aug 1, 2011 at 10:10 AM, Sarah Goslee <sarah.gos...@gmail.com> wrote: >> x <- cbind(x[,1:29], newcolumn, x[,30:ncol(x)]) >> >> On Mon, Aug 1, 2011 at 12:59 PM, Bansal, Vikas <vikas.ban...@kcl.ac.uk> >> wrote: >>> Dear all, >>> >>> I have a very simple question.I have data frame of 50 columns and i want to >>> insert a column in 30th position.But i do not want to delete that column.Is >>> it possible to include a column in between, so that new values are in 30th >>> column and 30 th column is now 31st and 31st is 32nd......so on and 50th >>> column is 51st..?I will be very thankful to you. >>> >>> >> >> >> >> -- >> Sarah Goslee >> http://www.functionaldiversity.org >> >> ______________________________________________ >> 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. >> > > > > -- > "Men by nature long to get on to the ultimate truths, and will often > be impatient with elementary studies or fight shy of them. If it were > possible to reach the ultimate truths without the elementary studies > usually prefixed to them, these would not be preparatory studies but > superfluous diversions." > > -- Maimonides (1135-1204) > > Bert Gunter > Genentech Nonclinical Biostatistics > -- "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics ______________________________________________ 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.
