R help - Feb 2012 - Multiple linear Regression: Standardized Coefficients

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It's a bit dangerous to call them "betas" in this list.
Standardized
regression coefficients sounds much better :)

A simple  way is to  first standardize your variables and then run lm again.

lm(scale(height)~scale(age) + factor(sex))
# or, depending on what you want:
lm(height~scale(age)+factor(sex))
# or, but only for Statistica and SPSS users:
lm(scale(height)~scale(age) + scale(sex))

# But of course, it's pointless in your case: standardization makes
sense when units don't matter
# but years and meters (even feet and inches, for that matter!) make
much more sense than sd
# "units" of  an  unknown sample.

KK





On 2/15/12, David Studer <studerov at gmail.com>
wrote:
> Hello everybody,
>
> Can anyone tell me, how to obtain standardized regression coefficients
> (betas) for
> my independent variables when doing a multiple linear regression?
>
> height<-c(180,160,150,170,190,172)
> sex<-c(1,2,2,1,1,2)
> age<-c(40,20,30,40,20,25)
>
> fit<-lm(height~age+sex)
> summary(fit)
>
> I already heard about the "QuantPsyc"-Package, which,
unfortunately,
> produces an error
> (it says "sd(<data.frame> is deprecated").
>
>
> Thank you very much!
> David
>
> 	[[alternative HTML version deleted]]
>
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