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Re: [Help-gsl] Interrupting and then resuming minimization

From: Pedro Gardete
Subject: Re: [Help-gsl] Interrupting and then resuming minimization
Date: Tue, 6 Aug 2019 22:29:52 -0700

Thank you. In my application, it's important that I get to the same local
minimum as if I hadn't stopped the minimizer. I believe saving x only won't
do the trick.

I've been trying to stop/resume the minimizer by saving the object
gsl_multimin_fminimizer, including its "void *state" pointer. Then, once I
resume, I load up all of the relevant fields. However, I think the
following command fails (which I found in fminimizer.c), probably because
of something wrong while saving/loading s->state.

(s->type->set) (s->state, s->f, s->x, &(s->size), step_size);

where s is the gsl_multimin_fminimizer object.

Thanks again.

On Tue, Aug 6, 2019 at 9:56 PM Patrick Alken <address@hidden> wrote:

> Can you just save the current position vector (state->x) and then start
> from there the next time?
> On 8/6/19 5:06 PM, Pedro Gardete wrote:
> > Hi,
> >
> > I'm running a minimization that may need to be interrupted some times,
> due
> > to computational constraints.
> >
> > Is there a way I can save the "gsl_multimin_minimizer" variable, so I can
> > resume optimization? The tricky part is that this struct has a void
> pointer
> > with unknown size... I assume the remaining fields of the struct simply
> > depend on the chosen minimization method.
> >
> > Thank you!
> > Pedro

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