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Re: st: RE: identifying observations where multiple conditions are met
From
Sergiy Radyakin <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: RE: identifying observations where multiple conditions are met
Date
Wed, 13 Nov 2013 15:38:14 -0500
//------------------------------------------
clear
set obs 100
gen id=floor(_n/2)
gen type=floor(uniform()*2)
//------------------------------------------
sort id
by id: egen flag=sd(type)
replace flag=1 if flag!=0
Best, Sergiy Radyakin
On Wed, Nov 13, 2013 at 3:24 PM, Allred, Elizabeth
<[email protected]> wrote:
> Have you tried:
>
> tab id if type==0 | type==1
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of Michael McCulloch
> Sent: Wednesday, November 13, 2013 3:14 PM
> To: [email protected]
> Subject: st: identifying observations where multiple conditions are met
>
> Hello,
> I have data of the structure:
> id (range 1 to 300)
> type (for each -id-, should equal only one of two values: 0 or 1).
>
> In manual inspection of the data, I see instances exist where, for the same -id-,
> some records have type==0, and
> other records have type==1.
>
> If I enter
> . tab id if type==0 & type==1
> obviously "no observations" is returned.
>
> How would I write a command in which I can tabulate all -id- for which some observations exist where type==0, and others where type==1? (At data entry, -type- should have unique for each -id-.)
>
>
> Best wishes,
> Michael McCulloch
>
> --
> Pine Street Foundation, since 1989
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