Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: Centering on age for -stcox-


From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: Centering on age for -stcox-
Date   Fri, 26 Sep 2008 21:34:36 +0100 (BST)

--- Michael McCulloch <[email protected]> wrote:
> At the bottom of that page, I read that this can be resolved by 
> subtracting mean age from each subject's age. I wish to do this 
> within a short program. How would I write a command that subtracts 
> the mean from age for each observation?

*--------------- begin example ----------------
sysuse cancer, clear
sum age if !missing(studytime, died, drug)
gen c_age = age - r(mean)
*---------------- end example -----------------
(For more on how to use examples I sent to the Statalist, see
http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )


-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


      
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index