|
|
Ublas : |
From: eeitan_at_[hidden]
Date: 2006-01-31 16:10:59
i do not know this package and i understand this package is not a free ware
so...
Quoting David M Garza <David.M.Garza_at_[hidden]>:
>
> SNOPT. I'm using the interface where it will expect the matrix in
> compressed column form. The argument list for the callback function
> only provides the value array--it expects you to remember the index
> arrays separately. I guess if you know SNOPT you know this already...
> Thanks!
> David
>
> eeitan_at_[hidden] wrote:
> >
> > Quoting David M Garza <David.M.Garza_at_[hidden]>:
> >
> >
> >>I'm working with a numerical optimizer designed for large, sparse
> >>problems and written in Fortran. When the the optimizer calls back for
> >>a Jacobian evaluation it passes the array where it expects the Jacobian
> >>values to be placed. Is there a simple way to build a uBLAS sparse
> >>matrix object which simply wraps this array? My first thought is no,
> >>but my second thought is "I could make a custom allocator..." Has
> >>someone already tackled this problem? I expect this array to be big
> >>(10,000-100,000 elements) so I'd like to avoid just copying it.
> >>
> >>Thanks,
> >>David
> >>
> >>_______________________________________________
> >>ublas mailing list
> >>ublas_at_[hidden]
> >>http://lists.boost.org/mailman/listinfo.cgi/ublas
> >>
> >
> > if you could tell me which optimizer it is, i will try to do so.
> >
> >
> > ----------------------------------------------------------------
> > This message was sent using IMP, the Internet Messaging Program.
> >
> > _______________________________________________
> > ublas mailing list
> > ublas_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/ublas
> >
> >
>
> _______________________________________________
> ublas mailing list
> ublas_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/ublas
>
----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.