d <- subset(c, c$a > 3 & c$a < 5.25 ) sum(d[,2]) --- [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. > ______________________________________________ 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.
