But ... On Sun, Nov 4, 2012 at 4:24 AM, Berend Hasselman <b...@xs4all.nl> wrote: > > On 04-11-2012, at 13:07, SHAILLY MEHROTRA wrote: > >> Dear R-users, >> >> I have dataset with column A and B with1000 values, >> >> For each of column C value (C = seq(1,1000,1), I want to repeat A and B >> values and calculate R = A+B*C for each row. >> >> I want to get output as >> >> A B C R >> 1 10 1 11 >> 2 30 1 32 >> 3 50 1 53 >> 1000 1000 1 2000 >> 1 10 2 21 >> 2 30 2 62 >> 3 50 2 103 >> 1000 1000 2 3000 >> >> How can I do it using for loop? >> > > You don't do that with a for loop. > You can do it like this, assuming your dataset is a data.frame and is named > "dat" > > > dat["R"] <- dat["A"] + dat["B"]*dat["C"]
dat[["R"]] <- dat[["A"]] + dat[["B"]]*dat[["C"]] would be better, I believe. And the OP would be well-advised to read the Intro to R tutorial before posting further on this list. To quote Rolf Turner on this list: " Learn something about R; don't just hammer and hope. Read the introductory manuals and scan the FAQ.." -- Bert > > dat[,"R"] <- dat[,"A"] + dat[,"B"]*dat[,"C"] > > Read the R intro manual. > > Berend > >> Thanks >> Shailly >> >> [[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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.
