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As Nick said, -egen- was not a good idea. -egen- expects a function with arguments in parantheses, while -gen- happily takes an expression, such as "_N"
HTH
Martin
-------- Original-Nachricht --------
> Datum: Sun, 15 Mar 2009 14:51:15 -0500
> Von: Christian Bustamante <[email protected]>
> An: [email protected]
> Betreff: Re: st: Panel with minimum observations
> Hi Joseph
>
> When I use the -egen- comman Stata prints the following error
>
> . by nit: egen myN=_N
> unknown egen function _N()
> r(133);
>
> So I used the -gen- command, and it works how I want to.
>
> Bests
>
> On Sun, Mar 15, 2009 at 2:54 AM, Joseph McDonnell <[email protected]>
> wrote:
> > . sort myid
> > . by myid: egen myN=_N
> > . drop if myN<=2
> >
> > Of course, dropping is quite a severe step. You might prefer to use
> > one of the 'mark' commands or just use the 'if' qualifier.
> >
> > Cheers
> >
> > Joseph
> >
> > On Sun, Mar 15, 2009 at 3:36 PM, Christian Bustamante <[email protected]>
> wrote:
> >> Hi everybody,
> >>
> >> I runing a panel data model with a large dataset. The panel is
> >> unnbalanced, so there is individuals with one or two observations. I
> >> don't want to use this observations in my model, how can I set it?
> >>
> >> Thanks in advance
> >>
> >> --
> >> CdeB
> >> *
> >> * For searches and help try:
> >> * http://www.stata.com/help.cgi?search
> >> * http://www.stata.com/support/statalist/faq
> >> * http://www.ats.ucla.edu/stat/stata/
> >>
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/help.cgi?search
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
>
>
> --
> CdeB
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
--
Martin Weiss
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*
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