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From: David M Garza (David.M.Garza_at_[hidden])
Date: 2006-01-31 14:38:08


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.
>
>
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