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RE: st: Questions for random data generation and value label
From
"David Radwin" <[email protected]>
To
<[email protected]>
Subject
RE: st: Questions for random data generation and value label
Date
Mon, 11 Mar 2013 10:16:46 -0700 (PDT)
Mark,
Are you thinking of -drawnorm-?
David
--
David Radwin
Senior Research Associate
MPR Associates, Inc.
2150 Shattuck Ave., Suite 800
Berkeley, CA 94704
Phone: 510-849-4942
Fax: 510-849-0794
www.mprinc.com
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Yu Xue
> Sent: Monday, March 11, 2013 9:50 AM
> To: [email protected]
> Subject: Re: st: Questions for random data generation and value label
>
> Thanks Maarten!
>
> What I want is Normal Distribution. Is there a way to randomly
> generate a variable with specific mean, SD, and range,
>
> Thanks!!
> Mark
>
> On Mon, Mar 11, 2013 at 10:35 AM, Maarten Buis <[email protected]>
> wrote:
> > On Mon, Mar 11, 2013 at 4:20 PM, Yu Xue wrote:
> >> I already checked "-help random_number_functions-", but I still can
> >> not find the answer to my question.
> >>
> >> I knew that I can use a formula similar like this:
> >> Var=a+int((b-a+1)*runiform()), to keep a specific range in [a,b]
> >> and use another formula: Var=invnorm(uniform())*SD+mean, to keep
> >> specific Standard deviation and mean.
> >> But I do not know how to generate a "Var" with all specific range,
SD,
> and mean.
> >> Please note that I do not generate a sample data from the actual
data,
> >> what I want to generate is synthetic data (totally fake data).
> >
> > What distribution do you want to draw your new variable from? Do you
> > want it to be normally (Gaussian) distributed, gamma distributed, beta
> > distribed, Fisk distributed, Laplace distributed, ... The number of
> > choices is huge, but without choosing your distribution you cannot
> > draw your random numbers.
> >
> > -- Maarten
> >
> >
> > ---------------------------------
> > Maarten L. Buis
> > WZB
> > Reichpietschufer 50
> > 10785 Berlin
> > Germany
> >
> > http://www.maartenbuis.nl
> > ---------------------------------
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