Nick,
My language was imprecise. I do not have a time series, but rather want to know in what proportion of weighted observations my condition holds.
That being said, -_gwtmean- does do what I want, albeit by creating an extra variable, which is easy enough to drop.
Thanks!
Howie
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Tuesday, February 10, 2009 3:24 PM
To: [email protected]
Subject: st: RE: Percent of time a
I interpret this as meaning that you have time series data with
regularly spaced observations. If that's not true, what follows will
need modification.
You need a weighted mean of an expression that would produce an
indicator variable. David Kantor's _gwtmean function for -egen- from SSC
will do that, but I don't know a command that will do this without
generating a new variable, but it's programmable.
Nick
[email protected]
Howard Lempel
Is there a command that will give me the proportion of the time a
variable is equal to a certain value? The command must accept weights.
I'm looking for something like -tabcond-, from SSC, but that returns
proportions as well as counts.
One option would be to -generate- a dummy equal to 1 when my variable is
equal to my value and zero otherwise and then to use -svy: mean-, but I
would prefer something that can be done in one line (and without
generating a new variable). My variable is continuous, so I don't want
to -svy: tab- the whole thing.
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