Re: st: too many variables.

[Steven Samuels <sjhsamuels@earthlink.net>]

Ashim, someone from StataCorp would give you more technical details,  
but, very roughly speaking,


                 memory usage = overhead + (#variables) x  
(#observations).

The 2048 variable limit is a maximum possible, IF you have the memory  
available to handle them. You may not:
If you try to add k new variables, you are increasing your memory  
usage by  k x (# observations) and this could put you over the limit.

Some solutions:
1. -compress-
2. -keep- only the variables you need for your analysis.
3. -drop- variables you previously created that you no longer need  
for this analysis (accomplishes same as 2. but may be shorter)
4. If not all observations are needed, keep only those you do need.

A reminder:  Maarten has asked you for the "exact" commands that you  
ran and the other details.  You responded with a vague description  
about generating some variables.  This was not helpful.


-Steven

On Aug 29, 2008, at 10:43 AM, Ashim Kapoor wrote:


> Maarten,
>
> I generate variables according to some rule. I guess that trigerred
> this when it could not add any more  ?
>
> Thank you,
> Ashim.
>
> On Fri, Aug 29, 2008 at 8:00 PM, Maarten buis  
> <maartenbuis@yahoo.co.uk> wrote:
>
> > --- Ashim Kapoor <ashimkapoor@gmail.com> wrote:
> > > When I do -help limits- I can clearly see that the max no of
> > > variables allowed in Stata IC which is what I am running is around
> > > 2000.
> > >
> > > I only have about 200 variables and then it says too many variables.
> > > I have set memory 1150m. Also is width  = no of variables ?
> > What is the _exact_ command that triggered this message?
> >
> > -- Maarten
> >
> >
> > -----------------------------------------
> > Maarten L. Buis
> > Department of Social Research Methodology
> > Vrije Universiteit Amsterdam
> > Boelelaan 1081
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