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st: Quotes for scalar within local (was efficiently run three loops (or do without them))


From   Ronnie Babigumira <rb.glists@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Quotes for scalar within local (was efficiently run three loops (or do without them))
Date   Tue, 14 Apr 2009 12:59:39 +0700

Thanks
Exploring your suggestion but wanting to put the checks in a macro rather than a variable, however,
I am stuck (I have checked the archives but I cannot find a solution)

An illustration using the auto data

local x "foreign == `i' & rep78 == `j'"
sysuse auto, clear
levelsof foreign, local(source)
foreach i of local source {
	levelsof rep78 if foreign == `i', local(rep)
		foreach j of local rep {
			sum mpg if `x'
			}
}	

I have set the trace on and this is where it fails
- sum mpg if `x'
= sum mpg if foreign ==  & rep78 ==

Looks like the `i' and `j' disappear. I have fiddled around with different combinations of quotes
but no luck.

Ronnie



Roy Wada wrote:

gen check=1 if fup_pdt>`x' | fup_unit=`Y' | fup_qtycoll`x' & fup_unit=`Y' & fup_qtycoll

where x, y, z are some conditions to be met. Then you would list them, i.e.
list fup_pdt fup_unit if check==1

And you'll know they aren't good at all.
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