Hi szhan,
I think Joshua gives all you wants -- scale is a really good function.
You can also make your own function work by setting an argument na.rm.
tmp1[tmp1==0]<-NA
student<- function(x){
x<-(x-mean(x,na.rm=T))/sd(x,na.rm=T)
return (x)
}
tmp4<-apply(tmp1, 2, student)
-----
A R learner.
--
View this message in context:
http://r.789695.n4.nabble.com/how-to-skip-a-specific-value-when-using-apply-function-to-a-matrix-tp2290898p2291678.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@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.
