--- K Jensen <[email protected]> wrote:
> I am trying to use some foreach loops to run various stcox models and
> to use testparm on them. I have a problem on the second run on each
> loop. What I'm doing is more complex, but the following code on the
> system "cancer" dataset causes the same problem:
>
> 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'
> }
> }
> This works fine for model1, which produces results as expected, but
> on model2 it generates the error message:
> "option nolog not allowed"
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 ----------------
(For more on how to use examples I sent to the Statalist, see
http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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