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st: "skipping" missing data


From   "B. Timothy Walsh" <btw1@columbia.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: "skipping" missing data
Date   Thu, 06 Aug 2009 11:39:08 -0400

I am attempting to generate predictions from regressions performed for each of a longish list of individuals. The problem is that, for some individuals, there are no dependent variable data (entries are missing), so the regression attempt fails. The problem is that the forvalues loop then exits. I would like to somehow "skip" these individuals. Loop seems to work fine if there are enough data to perform a regression. I'd be grateful for any suggestions.

Here's the code:
generate p1=.
forvalues i = 1/50 {		//50 individuals
	regress bperwk_ wk if ptnum == `i'
	predict p
	replace p1=p if ptnum == `i'
	drop p
}

I'm pretty much a Stata novice. So, I apologize if I am missing something obvious. Using version 10.1.

Many thanks!
Tim Walsh

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