you might want to see Douglas Bates. Least squares calculations in R. R News, 4(1):17-20, June 2004. http://CRAN.R-project.org/doc/Rnews/
he gives some rules of thumb, eg use solve(A,b) not solve(A) %*% b use crossprod(X) not t(X) %*% X use crossprod(X,y) not t(X) y ---- Katharine Mullen Department of Physics and Astronomy Faculty of Sciences Vrije Universiteit de Boelelaan 1081 1081 HV Amsterdam The Netherlands room: T.1.06 tel: +31 205987870 fax: +31 205987992 e-mail: [EMAIL PROTECTED] http://www.nat.vu.nl/~kate/ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
