Re: [Boost-mpi] Fwd: mpi: MPI_MAX_LOC

Subject: Re: [Boost-mpi] Fwd: mpi: MPI_MAX_LOC
From: MM (finjulhich_at_[hidden])
Date: 2013-10-14 05:02:23

That will give me the optimum value of  f(x1, ..., xn) but not _which_
(x1,....xn) gives that optimum evaluation of f.

MM

On 14 October 2013 09:57, Matthias Troyer <troyer_at_[hidden]> wrote:

>
> On 14 Oct 2013, at 10:53, MM <finjulhich_at_[hidden]> wrote:
>
> Hello
> In a problem of getting the maximum of a multi-variable function, I would
> use mpi::reduce and provide it with a function object that compares the
> evaluations of this function.
>
> Each process evaluates a part of the space, ie a number of n-tuples of the
> n-dimension space.
>
> How do I get the n-tuple that yields the max of f(), given that MPI_MAXLOC
> is not available in boost mpi?
>
> Thanks
>
> MM
>
>
>
> Hi MM,
>
> you can just provide your own function object to the boost::mpi::reduce
> function
>
> Matthias
>
>
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