Speaking Stata: How to move step by: step

The by varlist: construct is reviewed, showing how it can be used to tackle a variety of problems with group structure. These range from simply doing some calculations for each of several groups of observations to doing more advanced manipulations making use of the fact that with this construct, subscripts and the built-ins _n and _N are all interpreted within groups. A fairly complete tutorial on numerical evaluation of true and false conditions is included.


Issue Date:
2002
Publication Type:
Journal Article
DOI and Other Identifiers:
pr0004 (Other)
PURL Identifier:
http://purl.umn.edu/115953
Published in:
Stata Journal, Volume 02, Number 1
Page range:
86-102
Total Pages:
17

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 Record created 2017-04-01, last modified 2018-01-22

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