st: The Mystery Remains (was: Strange problem with stcox inside a loop)

["K Jensen" <k.x.jensen@googlemail.com>]

Thanks for the -tuples- suggestion, Maarten.  It looks like a useful
command in other contexts, but I don't want to run all possible
combinations of variables.

So, the mystery remains.  Can ANYONE out there explain why the code
marked "A" below works, but the code "B" gets the error message
"option nolog not allowed" when it runs model2?  Please!?

Yours desperately
Karin

*------------- begin A ---------------
sysuse auto
xi i.rep78
local model1 ""_Irep78*""
local model2 ""_Irep78* weight""
local models "`model1'" "`model2'"
local options ", noheader"
foreach m in `models' {
 regress price `m' `options'
 foreach var in `m' {
     testparm `var'
 }
}
*-------------- end A ----------------

*------------- begin B ---------------
sysuse cancer
stset studytime, fail(died)
xi i.drug
local model1 ""_Idrug*""
local model2 ""_Idrug* age""
local models "`model1'" "`model2'"
local options ", nolog"
foreach m in `models' {
 stcox `m' `options'
 foreach var in `m' {
     testparm `var'
 }
}
*-------------- end B ----------------

On 16/06/07, Maarten buis <maartenbuis@yahoo.co.uk> wrote:
> what about Nick's -tuples- command? See: -ssc desc tuples-
>
> Hope this helps,
> Maarten
>
> --- K Jensen <k.x.jensen@googlemail.com> wrote:
>
> > Thanks for replying, Maarten.
> >
> > Unfortunately, the solution you posted runs  _Idrug* and age as
> > separate models, which wasn't what I intended, and was why I used
> > the double quotes as I did.
> >
> > The results on the analogous code for regress on the auto dataset
> > that I posted before do work, and show what I was trying to do.
> >
> > With best wishes and thanks
> > Karin
> >
> > On 16/06/07, Maarten buis wrote:
> > > The problem has to do with the way you use double quotes. It's
> > > use is explained in -help quotes-. An example that works is
> > > shown below:
> > >
> > > *------------- begin example ---------------
> > > sysuse cancer, clear
> > > stset studytime, fail(died)
> > > xi i.drug
> > > local model1 "_Idrug*"
> > > local model2 "_Idrug* age"
> > > local models `"`model1' `model2'"'
> > > local options ", nolog"
> > >
> > > foreach m in `models' {
> > >  stcox `m' `options'
> > >  foreach var in `m' {
> > >      testparm `var'
> > >  }
> > > }
> > > *-------------- end example ----------------
> > >
> > > Hope this helps,
> > > Maarten
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