Hi you shall probably to be more specific
tj<-rnorm(5) vj<-matrix(25,5,5) sum(tj*vj) [1] 149.2977 gives you an answer but maybe not the answer you want. HTH Petr On 3 Oct 2006 at 8:58, Dina Said wrote: Date sent: Tue, 03 Oct 2006 08:58:15 +0200 From: Dina Said <[EMAIL PROTECTED]> To: r-help@stat.math.ethz.ch Subject: [R] Summation in R > Hello! > > Maybe this is a trivial question as I'm still a new baby in R but I > wish that u will help me. > > I want to calculate the following > > U= sum (t_j*v_j) > > where t_j is a vector > and v_j is the matrix > > Thanks > Dina > > ______________________________________________ > R-help@stat.math.ethz.ch 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. Petr Pikal [EMAIL PROTECTED] ______________________________________________ R-help@stat.math.ethz.ch 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.
