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st: funcdep & collapseunique
Thanks to Kit Baum, new updates to funcdep have been inserted into
the collapseunique module in SSC.
funcdep tests for functional dependency. The updates allow for a
variable to be generated that indicated where functional dependency
fails to hold. It is also an easy way to generate something to
indicate whether a variable has multiple values within certain
partitioning subsets (what you usually call by-groups, though the
relevant option is called -basis- here).
There was also an update to collapseunique.hlp (but not to collapseunique.ado).
funcdep is part of the collapseunique module. The collapseunique
program collapses a dataset into unique values by by-groups, provided
that they are indeed unique within by-groups.
(In case anyone downloaded collapseunique between last Friday and
today, you should re-download it; there has been another change today.)
Thanks again to Kit Baum for his work on SSC.
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