--- Paul Fenner [mailto:[email protected]] wrote:
> The following works in Stata9:
> local x = "lr1-ul6"
> foreach i of local x{
> su `i'
> }
> but
> local x = "lr1-ul6"
> foreach i of local x{
> ttest `i',by(gender)
> }
>
> with error r(103) too many variables specified.
In this case Stata will loop over the different
elements in the local x. The local x contains one
element: lr1-ul6, so the loop will go through only
one iteration and the local i will in that
iteration contain lr1-ul6. So in the first loop the
first and only iteration will read -su lr1-ul6-,
which is legal Stata syntax, and in the second loop
the first and only iteration will read
-ttest lr1-ul6, by(gender)-, which is illegal Stata
syntax since you specified too many variables as
the error message showed. What you probably want is
the following:
local x = "lr1-ul6"
su `i'
foreach i of varlist `x'{
ttest `i',by(gender)
}
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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