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RE: st: RE: mat size


From   "irodriguez" <irodriguez@utdt.edu>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: RE: mat size
Date   Thu, 02 Nov 2006 19:30:14 -0300

I had Stata Intercooled but now Ive Stata/SE How can I increase mat size 
above 800?

Thanks a lot

Ines

-----Original Message-----
From: "Nick Cox" <n.j.cox@durham.ac.uk>
To: <statalist@hsphsun2.harvard.edu>
Date: Wed, 1 Nov 2006 13:21:00 -0000
Subject: RE: st: RE: mat size

> Stata is telling you exactly what is wrong
> with your command. 
> 
> If you are using Intercooled Stata, that is 
> the end of the road for that command, as you 
> cannot increase -matsize- above 800. 
> 
> If you are using Stata/SE or Stata/MP, you 
> can, and must, increase -matsize-. 
> 
> In any case, I am not clear that you are doing what 
> Maarten recommended. I understand that he recommended
> -xtreg, fe-, and that you not use -xi:-. 
> 
> Nick 
> n.j.cox@durham.ac.uk 
> 
> irodriguez
>  
> > Ive tried this:
> >     xi: xtreg perform i.codempr, fe i(codempr)
> > 
> > But the outcome is similar:
> >  i.codempr         _Icodempr_1-1203    (naturally coded; _Icodempr_1 
> > omitted)
> >  matsize too small
> >  You have attempted to create a matrix with more than 800 
> > rows or columns
> >  or to fit a model with more than 800
> >  variables plus ancillary parameters.  You need to increase 
> > matsize using 
> > the
> >  set matsize command; see help matsize.
> >  r(908);
> > 
> > What Im doing wrong?
> 
> Maarten Buis
> 
> > > Apparently you are trying to estimate a fixed effects regression by
> > > adding 
> > > dummies. A better way of doing the fixed effects regression 
> > is -xtreg-
> > > with 
> > > the fe option. see: -help xtreg- and the entry for -xtreg- in the
> xt
> > > manual.
> 
> irodriguez
>  
> > > I am trying to run a OLS regression with panel data (8240 
> > observations)
> > > The explaining variable have 1203 categories
> > > 
> > > I estimate the following model:
> > >     set mem 50m
> > >     set matsize 800
> > >     xi: reg perform i.codempr
> > > but the outcome is:
> > > 
> > > i.codempr         _Icodempr_1-1203    (naturally coded; _Icodempr_1
> > > omitted)
> > > matsize too small
> > >     You have attempted to create a matrix with more than 800 rows
> or
> > > columns
> > > or to fit a model with more than 800
> > >     variables plus ancillary parameters.  You need to 
> > increase matsize
> > > using
> > > the set matsize command; see help matsize.
> > > r(908);
> 
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