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st: Re: AW: sort of standardization


From   Ginevra Biino <biino@igm.cnr.it>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: AW: sort of standardization
Date   Wed, 12 May 2010 16:47:23 +0200

no html, exactly. ;-)

Thanks a lot,
very efficient as usual

Ginevra


----- Original Message ----- From: "Martin Weiss" <martin.weiss1@gmx.de>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, May 12, 2010 4:37 PM
Subject: st: AW: sort of standardization



<>

No html, right?

*************
clear*

set obs 100

gen x1=rnormal()
gen x2=rnormal()
gen str5 x3="Hello"

qui ds, has(type numeric)


foreach var of varlist `r(varlist)'{
egen std_`var'=std(`var')
su `var', mean

gen rangecorrected_`var'=`var'/(`r(max)'-`r(min)')
}
*************



HTH
Martin

Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Ginevra Biino
Gesendet: Mittwoch, 12. Mai 2010 16:30
An: Statalist
Betreff: st: sort of standardization

Dear Statalist,
I have to standardize many variables (in order to run PCA).
Besides generating the n corresponding std(varname) vars, which I have
already done, I also want to generate n new variables obtained dividing
each variable by its range. Can anybody help me?
Ginevra



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