| Re: [eigen] UmfPackSupport vs SuperLUSupport: input matrix |
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- To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
- Subject: Re: [eigen] UmfPackSupport vs SuperLUSupport: input matrix
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Tue, 16 Apr 2013 14:43:34 +0200
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Hi,
this is because the matrix coefficients are modified by SuperLU
itself, so we have to make a copy to preserve the user data.
gael
On Tue, Apr 16, 2013 at 2:39 AM, Philippe Marti
<philippe.marti@xxxxxxxxx> wrote:
> Hi,
>
> The two sparse solvers provided by UmfPackSupport and SuperLUSupport deal
> differently with the input storage (at least if the input matrix is
> compressed and column major). UmfPackSupport only stores the pointers to the
> data while SuperLUSupport stores a copy of the data. Meaning that I can't
> really replace one by the other without either wasting memory or have some
> solver depend code. Did I miss something in the code?
>
> Has this been done on purpose? I couldn't find anything about this in the
> documentation.
>
> Thank you,
> Philippe