On Feb 25, 2009, at 11:24 AM, Ilona Carneiro wrote:
I am trying to write a programme that will run a command
sequentially for observations of an individual. For each individual
I have multiple spells and multiple failures. However, the twist is
that I also need to exclude a period of time at risk after each
treatment (prophylaxis) and after each failure (to prevent double-
counting of failures that may actually be the same episode). I
managed to do this without any problem for the treatment, but if an
episode is disqualified (by a prior treatment or episode) I don't
want it to disqualify a subsequent episode. Therefore I need to run
the code sequentially for each spell of an individual, but using
the marksample touse code to run it "by" individual doesn't seem to
be working - the "forvalues" seems to always interpret _N as the
last observation in the whole dataset, not the last observation for
each individual.
I have the following code:
[snip]
And the programme isn't doing what I need it to.
Any ideas?
I don't know enough about your data to know how relevant this
suggestion may be, but have you looked into -rolling-?
HTH,
Mike
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