Marius,
We don't provide a way to insert a "generic" sparse matrix into a bigger
matrices (dense matrices coming from element stiffness matrices yes) so I don't
see any simple solution. Does the submatrix you pull out have any particular
structure, what does it represent?
Barry
> On Jan 29, 2018, at 7:34 PM, Marius Buerkle <[email protected]> wrote:
>
> Hi !
>
> I have the followng problem. I create a Submatrix containing a subset of
> row/columns of the original matrix. After some matrix multiplications the
> non-zero strucutre of the resulting matrix changed. Now I want to insert this
> submatix back into the original one keeping only the non-zero entries which
> are present in the original matrix discarding the others which accumulated
> due to the matrix multiplications. Is there an easy or also not so easy way
> to do this ?
>
> Best,
> Marius
