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Re: st: GET SAMPLES IN STATA


From   sgsr100 <sgsr100@york.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: GET SAMPLES IN STATA
Date   Mon, 09 Feb 2004 12:16:26 +0000

Hi Joseph,
And how can I guarantee that I am keeping the remaining 67% for
houldout. What do you mean with
<command> if training?
with this 
Iam keeping the remaining?
Thanks

Joseph Coveney wrote:
> 
> You can flag training samples by -generate byte training = (uniform() < X)-,
> where X is the percentage of the total dataset that you want to use for
> training.  So, for example, if you want to use 33% for training and keep the
> remaining 67% for holdout, then the commands would be:
> 
> set seed <seed>
> generate byte training = uniform() < 0.33
> <command> if training
> 
> Joseph Coveney
> 
> ----------------------------------------------------------------------------
> sgsr100 wrote:
> 
> >Hi,
> >Do you know how can a get a training sample randomly chosen from stata
> >and how can I keep the remaining observations as a holdout sample.
> >Thanks,
> >Sandra
> 
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