[R] Function to Normalize Numerical Vector in R

[Daniel Malter]

If you are looking for a function to standardize a variable so that it has
mean zero and unit variance:

std=function(x){if(length(which(is.na(x)))==0) (x-mean(x))/sd(x) else
 
(x-mean(x,na.rm=T))/sd(x,na.rm=T)
}

x=rnorm(100,3,5)
mean(x)
sd(x)

x2=std(x)
mean(x2)
sd(x2) 

HTH,
Daniel

-------------------------
cuncta stricte discussurus
-------------------------

-----Ursprüngliche Nachricht-----
Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von Gundala Viswanath
Gesendet: Monday, September 07, 2009 11:24 PM
An: r-help at stat.math.ethz.ch
Betreff: [R] Function to Normalize Numerical Vector in R

Is there any?

- G.V.

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