Yes, because from your previous posts, you appeared to have read in
the data as "character":
file=read.table("file.txt",fill=T,colClasses = "character",header=T)But, of course, without a reproducible example, one cannot be sure. -- Bert On Thu, Jul 14, 2011 at 10:46 AM, Bansal, Vikas <vikas.ban...@kcl.ac.uk> wrote: > I have tried that also.But it is showing this error- > > aggregate(file[,3:6], by = list(file[,2]), FUN = sum) > > Error in FUN(X[[1L]], ...) : invalid 'type' (character) of argument > > > > Thanking you, > Warm Regards > Vikas Bansal > Msc Bioinformatics > Kings College London > ________________________________________ > From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf > Of Ben Bolker [bbol...@gmail.com] > Sent: Thursday, July 14, 2011 6:24 PM > To: r-h...@stat.math.ethz.ch > Subject: Re: [R] Adding rows based on column value > > Bansal, Vikas <vikas.bansal <at> kcl.ac.uk> writes: > >> I am using this- >> >> aggregate(x = file[,3:6], by = list(file[,2]), FUN = "sum") >> > > Better, although still not reproducible (please *do* read the posting > guide -- it is listed at the bottom of every R list post and is the > *first* google hit for "posting guide" (!); search for > "Examples"). What about removing the quotation marks around "sum"? > > aggregate(x = file[,3:6], by = list(file[,2]), FUN = sum) > > >> but I think this is not a right way. >> Because we cannot use "sum" to add.That is >> why I was asking for help. > > ______________________________________________ > 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. > -- "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.
