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Stata supports the following logical structures for programming. |
Stata Logic
Stata supports the following logical structures for programming.
Contents
Operators
Conditional Processing
By
The by command prefix causes a command to be repeated within groups.
A common usecase of the by structure is for identifying duplciate cases.
sort foo bar baz by foo bar baz: generate byte duplicate = cond(_N==1, 0, _n)