sum(c$b[(c$a > 3) & (c$a < 5.25)]) On 11/7/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Hello, > > A stupid question: > > I have an array with two columns, the first "a" acting as my index in 0.25 > steps, the second one "b" the column of interest. How can i sum up "b" only > for a specified window in "a" (as the window command for time series) > > a=seq(0,10,0.25) > b=runif(41) > c=data.frame(a,b) > > Sum up c if 3<a<5.25 > > How to do that? thanks > > marc > -- > Psssst! Schon vom neuen GMX MultiMessenger gehört? > Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger > > ______________________________________________ > 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. >
-- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.
