Re: st: simulating data for logistic regression: translating R toStata

[Michael McCulloch <mm@pinest.org>]

Thank you Maarten for your previous help.

For the command below which creates a variable with mean 200 and sd==25,
gen chol = 200+25 * invnorm(uniform())

what does the "invnorm(uniform()))" do?
I know the uniform() draws a random number with mean 0 and sd==1, but 
what about the "invnorm" part?
Michael



> --- Michael McCulloch <mm@pinest.org> wrote:
> >  I'm simulating data for logistic regression (code for variable
> >  generation is below) , and am missing the last step, linking
> >  exposureto disease. Disease will be a y/n variable.
> This was discussed in M.L. Buis (2007) "Stata tip 48: Discrete uses for
> uniform()" The Stata Journal, Vol. 7 No. 3, pp. 434-435.
> http://home.fsw.vu.nl/m.buis/wp/discrete.html
>
> Hope this helps,
> Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
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> 1081 HV Amsterdam
> The Netherlands
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>
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> http://home.fsw.vu.nl/m.buis/
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