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st: RE: identifying observations where multiple conditions are met
From
"Allred, Elizabeth" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: identifying observations where multiple conditions are met
Date
Wed, 13 Nov 2013 20:29:07 +0000
On further reading, I see... You're trying to find ids with "mixed messages," i.e., sometimes 0 sometimes 1.
gen zero=1 if type==0
gen one=1 if type==1
sort id
collapse (sum) zero one, by(id)
l id if zero==1 & one==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
124 Pine Street | San Anselmo | California | 94960-2674
P: (415) 407-1357 | F: (206) 338-2391 | http://www.PineStreetFoundation.org
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