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Re: st: Using the -if- qualifier with a string variable
At 16:15 03/04/2005, Louis wrote:
You should type
Can the -if- qualifier be used with a string variable? If so, how is it
done? I gave the following command, and had the shown result:
. keep if facility==bir
bir not found
"facility" is a string variable and "bir" is one of the values "facility"
keep if facility=="bir"
That way, Stata knows that "bir" is a string value. If you type
keep if facility==bir
then Stata will look for a string variable named bir, and will complain if
it doesn't find it.
I hope this helps.
Lecturer in Medical Statistics
Department of Public Health Sciences
Division of Asthma, Allergy and Lung Biology
King's College London
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