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Re: st: Keep all the observations in a day if the variable takes value 1 at least in one time interval.


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Keep all the observations in a day if the variable takes value 1 at least in one time interval.
Date   Mon, 15 Aug 2011 11:59:27 +0100

I take "value 1 at least in one of the time intervals" to mean "value
1 in at least in one of the time intervals" and not "value at least 1
in one of the time intervals".

egen everone = total(s1 == 1), by(day)
keep if everone

See also

SJ-11-2 dm0055  . . . . . . . . . . . . . .  Speaking Stata: Compared with ...
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
        Q2/11   SJ 11(2):305--314                                (no commands)
        reviews techniques for relating values to values in other
        observations

Nick

On Mon, Aug 15, 2011 at 11:42 AM, Katia Bobulova
<katia.bobulova@googlemail.com> wrote:

> I would like to keep all the observations in one day (which it is
> divideded in time intervals), if a variable takes value 1 at least in
> one of the time intervals.
>
> However, if I type:
>
> keep data if s1==1 I will obatian only the time intervals and not the whole day.
>
> Do you have any suggestion on how to do?
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