There is nothing non-standard here about the
options, so I will set that on one side:
program foo
syntax [name] [if] [in]
marksample touse
di "|`namelist'|"
count if `touse'
end
shows that the syntax you need may essentially be
that of your specification. Absent a varlist,
-marksample- regards every observation as prima
facie acceptable, but -if- and -in- conditions
may throw out some, as normal.
I don't however understand the bit about
variables not in memory. Stata isn't good
at extra-sensory perception...
Nick
[email protected]
David Harrison
> I want to write a command with the syntax
>
> command [name] [if exp] [in range] [, opt1 opt2 *]
>
> BUT, the -if exp- and -in range- are to be applied in a -use-
> statement, so they may involve variables that are not in the
> dataset in memory. Any suggestions on how I can parse this to
> get the locals `namelist' `if' `in' `opt1' `opt2' and
> `options' that would be produced by -syntax-?
>
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