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Re: Re: st: a little bit of Stata programming....


From   "Nirina F" <fstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: Re: st: a little bit of Stata programming....
Date   Thu, 20 Sep 2007 04:24:59 -0400

Thanks a lot for pointing it out Nick. It helped.
Nothing to report to Statacorp. Forgive my slow learning of Stata
still on a steep curve ( I could just not figure out of the list of
extended function that "list" was the command to use. )

Nirina

On 9/19/07, n j cox <n.j.cox@durham.ac.uk> wrote:
> First, I assume that that "until" is not to be taken
> literally and that all your globals contain lists
> of variable names (which don't need expansion).
>
> Then what you want is I think
>
> foreach i of local out {
>        local x : list xvars - i
>        reg `i' `x'
> }
>
> Note incidentally that, although it was not part
> of your question,
>
> foreach i in out
>
> is quite wrong for what you want.
>
> Both this point and the answer to your question are
> spelled out in the help, so perhaps you should indicate
> to StataCorp what is unclear in their documentation.
>
> Nick
> n.j.cox@durham.ac.uk
>
>
> Nirina F
>
> I tried to see but still couldn't figure out.
> so you mean there is an option command for me to tell xvars to not
> include i ?
>
> Austin Nichols
>
>  > see -help macrolists- (linked from -help extended_fcn- which is linked
>  > from -help macro-).
>
> Nirina F
>
>  > > I have:
>  > >
>  > > global  x "x1 until x8"
>  > > global y "y1 until y15"
>  > > global z "z1 until z3"
>  > > global w "w1 until w24"
>  > > global k "k1 until k9"
>  > >
>  > > local xvars "$x $y $z $w $k"
>  > > local out "x1 y1 z1 w1 k1 x7 y13 z3 k4 w20"
>  > >
>  > > I would like to do
>  > >
>  > > foreach i in out {
>  > > reg `i' `xvars'
>  > > }
>  > >
>  > > but now I would have depedent variable collinear with one of control
>  > > variable. So how could I run the reg but telling my controls `xvars'
>  > > to not include what is taken by `i' ?
>
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