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st: How to standardize a variable with a define mean

From   Alberto R Osella <>
To   "" <>
Subject   st: How to standardize a variable with a define mean
Date   Wed, 01 Feb 2012 10:44:25 +0100

Dear Statalisters,
I want to standardize a variable (BMI) with a given mean value. I've obtained that value from a -summarize- command, that is r(mean). Now I want to pass the value of r(mean) to the egen command. Here the commands and the error returned by Stata.

. sum BMI
. scalar meanbmi=r(mean)
. display meanbmi
. egen stdbmi=std(BMI), mean(meanbmi) std(1)
option mean() incorrectly specified

I'd want to do this automatically. Can someone help me?
Thank you in advance

Alberto R. Osella, MD, PhD
Laboratorio di Epidemiologia e Biostatistica
IRCCS Saverio de Bellis
Via Turi, 27
70013 Castellana Grotte (BA)
Tel:    +39 0804994655
Fax:    +39 0804994650

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