[SciPy-User] create sparse matrix from diagonal arrays

[Darcoux Christine]

I would like to solve a PDE using an implicit finite volume discretization.
Since the problem is 3D, the matrix should be septadiagonal. I have
computed the 7 diagonals (for top, bottom, east, west, north south and
central point) in 7 different arrays.

Now, I would like to create a sparse matrix object from these arrays, but I
feel a little lost with the documentation of scipy.sparse.spdiags.

Help would be greatly appreciated.

Christine
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