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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 12:11:40 +0100

Corrected English:

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


On Mon, Aug 15, 2011 at 11:59 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> 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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