Nick Cox wrote:
If one wants to do a certain operation on all obs with -var1-==X,
indexing through all the values of X, and do so in order of
increasing
X, then the value of such a ranking becomes obvious.
Now we have convergence. Try -egen, group()-.
Not clear to me that -group(X)- assigns values in
order of increasing X (even if, as E Berkhout suggests
in a separate posting, I sort -sort X- first).
BTW: have a look also at -levels-.
Same problem. Not clear that -levels- returns a list that
is sorted in increasing order. Plus, in my particular
case I have non-integers (though that's easily gotten
around).
cheers,
Jeph
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