I apologize--let me provide a few more details. The
previous was actually part of a larger little program
which essentially used a portion of a large database
(gender==1), displayed a description of the ranksum to
be performed, quietly tabulated the arithmetic,
geometric, and harmonic means of a continuous variable
then attempted to ranksum test for differences in the
geometric means of that continuous variable across
categories of categorical variables noted as `1' (var1
var2), as in the below, full program. There is only
one observation of the continuous variable per id.
capture program drop taball
program define taball
while "`1'" ~="" {
use database1, clear
keep if gender==1
display "ranksum GEOMETRIC MEAN fp3 by `1' "
sort `1'
quietly means fp3
local `gmeanfp3' = r(mean_g)
ranksum `gmeanfp3' if `1'~=9999, by(`1')
mac shift
}
end
taball var1 var2
I can report the geometric means of my continuous
variable across categories of var1, etc., but I want
to test if there are differences in these geometric
means of the continuous variable between those
categories of var1, if that makes sense.
I know that the local macro generates a constant, and
thus the above would not work, however I can't think
of alternatives at this point.
Again, any suggestions would be appreciated.
--- "Steichen, Thomas" <[email protected]> wrote:
> JL Greig writes:
>
> > I'm having a great deal of difficulty trying to do
> > anovas, ranksums, regressions, etc. on the
> geometric
> > mean of a continuous variable--just capturing the
> > saved results following a means command ofcourse
> does
> > not work, as below with ranksum:
> >
> > .quietly means fp3
> > .local `gmeanfp3' = r(mean_g)
> > .ranksum `gmeanfp3' if `1'~=9999, by(`1')
> >
> > which gives me an error message of "_= invalid
> name".
> >
> > Any suggestions at all would be much appreciated.
>
> JL,
>
> I think you need to be clearer about what you intend
> to accomplish.
> Please provide a more explicit description or
> example of what
> you are trying to do.
>
> Beyond that... it is very difficult to perform most
> statistical
> techniques when your variable is a constant (and
> that is what you
> have when you use -means- and a local macro). I'm
> sure -ranksum-
> is blowing out because it does not have a variable
> to operate on...
> `gmeanfp3' is a local macro, not a variable.
>
> Further, `1' may or may not be defined... but we
> can't tell from
> the code you show.
>
> Tom
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