I'm facing a problem while scaling(z-transform) the row values of a numeric data matrix,using the following code:
rm(list=ls())
set.seed(12345)
my.mat <- matrix(rnorm(120,0,0.5),nrow=6,byrow=TRUE)
rownames(my.mat) <- paste("s",1:6,sep="")
colnames(my.mat) <- paste("g",1:20,sep="")...