On Sat, Apr 10, 2010 at 5:13 PM, Paul Smith <phh...@gmail.com> wrote: >> I am trying to minimize the quardratic form w'Aw, with certain >> constraints. >> In particular, >> (1) A=(a_{ij}) is n by n matrix and it is symmetric positive definite, >> a_{ii}=1 for all i; >> and 0<a_{ij}<1 for i not equal j. >> (2) w'1=n; >> (3) w_{i}>=0 >> >> Analytically, for n=2, it is easy to come up with a result. For larger n, it >> seems >> difficult to obtain the result. >> >> Does any one know whether it is possible to use R to numerically compute it? > > And your decision variables are? Both w[i] and a[i,j] ?
In addition, what do you mean by "larger n"? n = 20 is already large (in your sense)? Paul ______________________________________________ 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.