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st: RE: Re: RE: Random number seed


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Re: RE: Random number seed
Date   Thu, 20 May 2004 15:47:06 +0100

That's correct. I overlooked the importance
of doing in it in batch mode. It follows 
that you must change the seed within 
your do file. 

Nick 
n.j.cox@durham.ac.uk 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Subhankar
> Nayak
> Sent: 20 May 2004 15:41
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Re: RE: Random number seed
> 
> 
> You are right.
> Once I open stata and generate random numbers, the seed keeps 
> on changing
> and it is completely randomized.
> 
> But since the program is long, I am running it without 
> opening stata. I am
> running it in the batch mode giving the command
> 
> stata -b do market.do
> 
> This program opens stata each time and hence gets the same 
> seed and the same
> set of random numbers each time.
> 
> Thanks,
> Subh
> 
> ----- Original Message ----- 
> From: "Nick Cox" <n.j.cox@durham.ac.uk>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Thursday, May 20, 2004 10:24 AM
> Subject: st: RE: Random number seed
> 
> 
> > Your premise is false. Just because
> > the seed remains the same does not
> > imply identical samples (of a given size).
> > Conversely, explicitly setting the seed to the
> > same number as before the last
> > call does ensure an identical sample.
> >
> > However, you can indeed change the seed easily.
> >
> > . search seed
> >
> > points to ways of doing this.
> >
> > More generally, there is a great
> > deal of help on-line, which will
> > save you time.
> >
> > Nick
> > n.j.cox@durham.ac.uk
> >
> > > -----Original Message-----
> > > From: owner-statalist@hsphsun2.harvard.edu
> > > [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of 
> Subhankar
> > > Nayak
> > > Sent: 20 May 2004 15:16
> > > To: statalist@hsphsun2.harvard.edu
> > > Subject: st: Random number seed
> > >
> > >
> > > Can the stata random number seed be itself randomized?
> > >
> > > I am running a program called "market.do" in the batch 
> mode without
> > > invoking/opening stata. This program carries out an analysis
> > > based on a set
> > > of 1,000 uniform random numbers it generates.
> > >
> > > However, since the random seed is always the same 
> everytime I run the
> > > program in batch mode, I get the same set of 1,000 random
> > > numbers each time
> > > I run this program in batch mode. Results are identical which
> > > defeats the purpose.
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> >
> 
> 
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 

*
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