[R] Matrix operations

From: Dmitrij Kudriavcev <dimitrij.kudriavcev_at_ntsg.lt>
Date: Tue, 29 Jun 2010 12:28:33 +1000


I have a quick question.

I need to compute matrix in R, like A <- t(X) %*% solve(V) %*% X, where X is a vector and V is a matrix

This code works, but now i want to optimize it. I have try:

A <- crossprod(X, solve(V)) %*% X

Is there another, better way?


        [[alternative HTML version deleted]]

R-help_at_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. Received on Tue 29 Jun 2010 - 02:50:16 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Tue 29 Jun 2010 - 03:20:43 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive