[Gretl-users] accessing $vcv etc.

[Allin Cottrell]

On Fri, 13 Oct 2006, Sven Schreiber wrote:

> Allin Cottrell schrieb:
>>
>> One other point: when you estimate a model via the gui (single equation
>> or multiple) it does _not_ become the "last model", for data retrieval
>> purposes, so far as the console is concerned. This is perhaps debatable,
>> but it's by design.  The idea was that things could get confusing.
>> Suppose a user has one "thread" going in the console (estimate, retrieve
>> values, calculate), and then, "on the side", estimates a model via
>> point-and-click.  Then where should, say, $uhat be drawn from in the
>> next console command?
>> At present the answer is, from the last model estimated via the console.
>
> So this goes both ways, does it? I mean that also a new console/script
> estimate does not affect the model which is used for menu commands?

Yes.  When you have a model window open, the window is "shadowed" 
by an in-memory copy of the model in question, so when you save 
data from a given model window you should always get data from 
that particular model, regardless of any other models that may 
have been estimated more recently.

> I can see the point, although personally I use (or would like to 
> use) gretl differently.

I can see a case for having the behaviour that you expected (i.e. 
estimating a model via the gui updates the "last model" as seen 
from the console).  That wouldn't be difficult to do.

> Btw, is there a kind of system to track
> enhancement requests like these? I might get around sometime to
> contribute some documentation, but not right now. And without a
> bugtracker this may be forgotten.

There is such a mechanism on sourceforge.  I haven't used it much 
to date, but it's there.

> Anyway, I guess my stumbling point was just the fact that 
> matrices aren't yet supported via the gui. It would be nice if 
> that could be added, but I understand/agree that that doesn't 
> have a high priority.

There's some exploratory code in place, not activated yet.  I'll 
get around to doing some more on that at some point.

Allin.