<>
I think your problem could be solved more succinctly as
*************
sysuse auto, clear
statsby, by(rep78 foreign) clear : sum mpg
list, noobs
*************
On the delayed evaluation thing, note Nick`s
http://www.stata.com/statalist/archive/2008-06/msg01028.html
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Ronnie
Babigumira
Gesendet: Dienstag, 14. April 2009 08:00
An: [email protected]
Betreff: st: Quotes for scalar within local (was efficiently run three loops
(or do without them))
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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