On Fri, 23 Oct 2009, Riccardo (Jack) Lucchetti wrote:
On Thu, 22 Oct 2009, Allin Cottrell wrote:
> What I'm aiming to implement is:
> * the ability to save a named model within a loop;
> * the ability to add the last model to the "model table" within a
> loop; plus
> * the corresponding functionality for graphs within loops (save
> named graph; add graph to the GUI "graph page").
> So this is something that, hopefully, should be available before
> too long.
FWIW, I'm not entirely enthusiastic about this kind of thing. Sure, the
more you can do (especially in a script), the better. But my spider sense
is tingling --- there are many many things that can go wrong with this
You may well be right, but what sort of going-wrong do you have in
By the way, what's the point of storing models in a loop? The
situation I can think of is when you have to apply the same estimation
method over and over again and need to compare the results at the end.
Except when you have very few of them, you probably won't want to compare
them by clicking on each model in turn and having a gazillion windows open
on your desktop. What you probably want to do is store the relevant
quantities (coefficients, residuals, information criteria) somewhere (in a
matrix, a text file, whatever) and start from there.
I agree, that will often be a smarter thing to do. I was thinking
of the case where you're estimating relatively few models (maybe
the same model on different samples), and you'd like to be able to
compare the models side by side.
Of course in such a case it shouldn't be too burdensome to
"unroll" the loop, yet in some contexts there may be a fair amount
of setup to be repeated each time, so that a loop might be
noticeably more convenient.