http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
- Original Message -
From: "Benilton Carvalho" <[EMAIL PROTECTED]>
To: "[EMAIL PROTECTED] server posting"
Sent: Monday, May 14, 2007 6:58 PM
Subject: [R] Efficient
Hi everyone,
I was wondering if there is anything already implemented for
efficient ("row-wise") computation of group-specific trimmed stats
(mean and sd on the trimmed vector) on large matrices.
For example:
set.seed(1)
nc = 300
nr = 25
x = matrix(rnorm(nc*nr), ncol=nc)
g = matrix(sampl
