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Re: st: Q re Quarterly Labour Force Survey


From   "Ada Ma" <heu034@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Q re Quarterly Labour Force Survey
Date   Tue, 7 Nov 2006 15:30:15 +0000

OK - finally got you!  I understand it now and shall try my hands on
it later today.
Thanks a lot for being insistent.


On 11/6/06, Nick Cox <n.j.cox@durham.ac.uk> wrote:
Even faster to use macrolist stuff than -summarize-.

Nick
n.j.cox@durham.ac.uk

Ada Ma

> Thanks nick for the suggestion.  I have now have two list - one list
> of variables which are in the dataset throughout the entire period,
> and another list of variables which are not in every single quarter.
> I am also using -summarize- instead of -ds- as I have read it
> somewhere that it is somewhat slower to use ado files than native
> commands.

Nick Cox

> > If the issue is which of a set of names is in another list,
> > then this is very inefficient, although you might be hard put
> > to notice that.
> >
> > -ds- is an undocumented command written in Stata,
> > but as such implies an interpretative overhead which
> > is not needed here.
> >
> > The -help- for -macrolists- gives details of various
> > list operators that should offer more direct solutions,
> > including intersection, union and difference.
> >

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