On May 27, 2010, at 7:24 AM, Johannes Graumann wrote:
Hi,
Why is the result of below "apply" call rotated with respect to the
input
and how to remedy this?
Because the processing you requested is with respect to rows and the
construction of matrices is by default by columns.
?t
Thanks, Joh
.ZScore <- function(input){
#cat(input,"\n")
z <- (input - mean(input))/sd(input)
return(z)
}
apply(data.frame(x1=c(1,2,3,4,5),x2=c(2,3,4,5,6),x3=c(3,4,5,6,7)),
1,.ZScore)
David Winsemius, MD
West Hartford, CT
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