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"] 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.
