On Fri, Mar 09, 2012 at 01:24:00PM +0330, Hassan Eini Zinab wrote: > Dear All, > > I have a data set with variables x1, x2, x3, ..., x20 and I want to > create z1, z2, z3, ..., z20 with the following formula: > > > z1 = 200 - x1 > z2 = 200 - x2 > z3 = 200 - x3 > . > . > . > z20 = 200 - x20. > > > I tried using a for loop and its index as: > > for (i in 1:20) { > z(i) = 200 - x(i) > }
Hi. Try this. x <- 21:40 z <- 200 - x x[1] # [1] 21 x[2] # [1] 22 z[1] # [1] 179 z[2] # [1] 178 Hope this helps. Petr Savicky. ______________________________________________ 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.