That's a pretty lousy solution. Here's a better one: 
program cnumlist, rclass
	version 8.2 
	numlist `0' 
	local result "`r(numlist)'" 
	local result : subinstr local result " " ",", all
	return local numlist "`result'"
end 	
i.e. this should take the same input as -numlist-. 
Very little testing! 
Nick 
[email protected] 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Nick Cox
 
> While I agree on this, see -cseplist- in -listutil- on SSC, 
> as one of several possible solutions. 
> 
> Enzo Coviello
>  
> > I would find useful if -numlist could return, as option,  a 
> > comma separated 
> > numeric list.
> > There is some Stata function, i.e. -recode -inlist, that 
> > needs as input a 
> > comma separated list.
> > So we could feed them directly with the r(numlist) output.
> > 
> > I wonder if other Users would find useful this addition.
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