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st: identifying observations where multiple conditions are met
From
Michael McCulloch <[email protected]>
To
[email protected]
Subject
st: identifying observations where multiple conditions are met
Date
Wed, 13 Nov 2013 12:14:13 -0800
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
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