st: xt: Parsing a varlist in a stata command's options

[adiallo5@worldbank.org]

Dear all,

I have a personal ado that compiles a series of results in a matrice.

So far, my program has 3 otptions.

syntax varlist  [if] [in] [aweight fweight] [, g1(varname) g2(varname)
g3(varname)]

and is working fine. Off course, I could keep expanding my options by g4 g5,
etc.
But it would be tiduous.

I want to generalize the options to something like:

prog Myprog
syntax varlist  [if] [in] [aweight fweight] [, BYGroup([varlist2])]
tokenize `varlist'
...
while "`1'"~="" {
   ...
   if  "`bygroup'" ~="" {
        tokenize `varlist2'
       ....
   }
}

So that at the end, my command will just be :

Myprog x1 x2 x3, by(V1 V2 V3 V4 V5 V6)

But it is not working.
How to generalize the options so that I will not limit myself ?

Thanks.
Amadou

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