# Re: st: RE: RE: Using variables in numlist of forvalue command

 From "shawnfultz" <[email protected]> To [email protected] Subject Re: st: RE: RE: Using variables in numlist of forvalue command Date Wed, 08 Jun 2005 19:24:02 -0000

```And worked wonderfully.

Thanks,

--- In [email protected], Nick Winter <nw53@c...> wrote:
> At least the advice was convergent, if not *precisely* identical.
>
> --Nick W
>
>
>
> It 12:56 PM 6/8/2005, you wrote:
> >Oh shucks, I see that Nick Winter has already
> >
> >Nick
> >n.j.cox@d...
> >
> >Nick Cox
> >
> > > You can't put a variable into a numlist
> > > in this way.
> > >
> > > Try something like
> > >
> > > su daysupply, meanonly
> > > forvalues daynum = 2/`r(max)' {
> > >       replace date`daynum' = date1 + `daynum' - 1 if `daynum'
> > > <= daysupply
> > > }
> > >
> > > You may know the maximum in advance, so that you
> > > can simplify to say
> > >
> > > forvalues daynum = 2/10 {
> > >       replace date`daynum' = date1 + `daynum' - 1 if `daynum'
> > > <= daysupply
> > > }
> > >
> > > Nick
> > > n.j.cox@d...
> > >
> > > Shawn.Fultz@m...
> > >
> > > I'm trying to change several variables in each observation.
> > > The problem is that the number of variables I want to update
> > > is different for each observation and this number is a
> > > variable in that observation. I've tried using a forvalues
> > > loop, which works if I specify a stop and start number, but I
> > > cannot find a way to put a variable in the numlist allowing
> > > this to change for each observation.
> > >
> > > Here's the command that works:
> > >         forvalues daynum = 2/10 {
> > >         replace date`daynum'=date1+`daynum'-1
> > >         }
> > >
> > > But when I replace the 10 with the variable that tells me how
> > > many date variables to change, I get a syntax error.
> > >         forvalues daynum = 2/daysupply {
> > >         replace date`daynum'=date1+`daynum'-1
> > >         }
> >
> >*
> >*   For searches and help try:
> >*   http://www.stata.com/support/faqs/res/findit.html
> >*   http://www.stata.com/support/statalist/faq
> >*   http://www.ats.ucla.edu/stat/stata/
>
> --------------------------------------------------------
> Nicholas Winter                           607.255.8819 t
> Assistant Professor                       607.255.4530 f
> Department of Government              nw53@c... e
> 308 White Hall            falcon.arts.cornell.edu/nw53 w
> Cornell University
> Ithaca, NY 14853-4601
>
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
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*   http://www.ats.ucla.edu/stat/stata/
```