Ines:
Your original question was how to estimate:
-xi: reg perform i.codempr- if codeempr has 1203 values.
If you want to enter other variables to explain perform
than -xtreg- with the fe option is very much the
preferred method of doing it. In that case you would
type -xtreg perform othervariables, fe i(codempr)- But
if you don't want to add any other explanatory
ariables, then all you want to do is to estimate a mean
of perform for every value of codeempr. That is easier
achieved with -collapse mean perform, by(codeempr)-.
Neither of these solutions would require you to have a
matsize of over 800.
HTH,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of irodriguez
Sent: donderdag 2 november 2006 23:30
To: [email protected]
Subject: RE: st: RE: mat size
I had Stata Intercooled but now I�ve Stata/SE How can I increase mat size
above 800?
Thanks a lot
Ines
-----Original Message-----
From: "Nick Cox" <[email protected]>
To: <[email protected]>
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
> [email protected]
>
> irodriguez
>
> > I�ve 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 I�m 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);
>
> *
> * 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
* 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
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
