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Re: st: AW: Area under a percentile point


From   zeynep elitaş <zelitas@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: Area under a percentile point
Date   Tue, 3 Feb 2009 16:47:36 +0200

Thanks for help, but this does not solve my problem.  As a simple
example, lets assume we have a data set containing five 6's and five
7's. so the sample size is 10. Now if I wanted to keep the data values
below the 75 th percentile, I would roughly have 7 observations
remaining. However, following your suggestion I end up keeping all the
observations.
Thanks
Zeynep Elitas

2009/2/3 Martin Weiss <martin.weiss1@gmx.de>:
>
> <>
>
> Let`s keep those below the 75 percentile of generated normal deviates...
>
> *************
> clear*
> set obs 1000
> generate x=rnormal()
> _pctile x, p(75)
> keep if x<=r(r1)
> *************
>
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von zeynep elitas
> Gesendet: Dienstag, 3. Februar 2009 14:28
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: Area under a percentile point
>
> I have a simple question which I do not have the answer for. Is there
> a way to tell Stata to keep the data under a certain percentile point
> and drop the rest?  This is important since in my data a percentile
> point has often the same value as the ones below and over it.
>
> Thanks
> Zeynep Elitaş
>
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