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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: Wed, 7 Aug 2019 11:53:03 -0700

Thanks again for the help. It was a question of going into the gsl C files
and saving object s properly.


On Tue, Aug 6, 2019 at 10:29 PM Pedro Gardete <address@hidden>

> 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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