R help - Aug 2010 - question!!!!

I made some design matrix X(in linear regression model)

I there any method to normalize X?
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Hi
> I made some design matrix X(in linear regression model)
>
> I there any method to normalize X?
You can normalize a matrix column-wise like this:

# m is a matrix
apply(m, 2, function(x) x / max(x) )

Or normalize row-wise like this:
t(apply(m, 1, function(x) x / max(x) ))

I'm sure there are more elegant ways to do it but those work for me.

Michael

?scale

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of leepama
> Sent: Tuesday, August 03, 2010 10:55 PM
> To: r-help at r-project.org
> Subject: [R] question!!!!
> 
> 
> I made some design matrix X(in linear regression model)
> 
> I there any method to normalize X?
> --
> View this message in context: http://r.789695.n4.nabble.com/question-
> tp2312938p2312938.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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