Re: [OctDev] quick release

[David B. <Dav...@mo...>]

If this causes a core-dump, the bulletproofing should be in bfgsmin itself
rather than in the objective function. Nothing the user can do should cause
a core-dump, otherwise it is a bug..

D.

According to Michael Creel <mic...@ua...> (on 09/03/04):
> On Friday 03 September 2004 14:24, Teemu Ikonen wrote:
> 
> >
> > bfgsmin consistently makes octave dump core on at least one fitting problem
> > I have. Unfortunately I don't have the time to send a more detailed bug
> > report just now.
> >
> > Teemu
> >
> 
> I'll be happy to look at it when you have time to send it in. Just guessing, 
> but if your objective function goes non-numeric, you might get problems. I do 
> something like the following to bullet-proof
> 
> Michael
> 
> 
> # this takes a general model and calculates average log likelihood
> function [obj_value, score] = mle_obj(theta, model, modelargs)
>  [obj_value, score] = feval(model, theta, modelargs);
>  obj_value = - mean(obj_value);
> 
>  # let's bullet-proof this in case the model goes nuts
>  if (((abs(obj_value) == Inf)) || (isnan(obj_value)))
>   obj_value = realmax;
>  endif
> 
>  if isnumeric(score) score = - mean(score)'; endif
> endfunction 
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by BEA Weblogic Workshop
> FREE Java Enterprise J2EE developer tools!
> Get your free copy of BEA WebLogic Workshop 8.1 today.
> http://ads.osdn.com/?ad_id=5047&alloc_id=10808&op=click
> _______________________________________________
> Octave-dev mailing list
> Oct...@li...
> https://lists.sourceforge.net/lists/listinfo/octave-dev

-- 
David Bateman                                Dav...@mo...
Motorola CRM                                 +33 1 69 35 48 04 (Ph) 
Parc Les Algorithmes, Commune de St Aubin    +33 1 69 35 77 01 (Fax) 
91193 Gif-Sur-Yvette FRANCE

The information contained in this communication has been classified as: 

[x] General Business Information 
[ ] Motorola Internal Use Only 
[ ] Motorola Confidential Proprietary