On page 22 of the R-introduction guide it's written: the quadratic form x^{'} A^{-1} x which is used in multivariate computations, should be computed by something like x%*%solve(A,x), rather than computing the inverse of A.
Why isn't it good to compute t(x) %*% solve(A) %*% x? Thanks a lot for help! ______________________________________________ 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