[petsc-users] Insert one sparse matrix as a block in another

[Peder Jørgensgaard Olesen]

Hello


I have a set of sparse matrices (A1, A2, ...) , and need to generate a larger matrix B with these as submatrices. I do not know the precise sparse layouts of the A's (only that each row has one or two non-zero values), and extracting all values to copy into B seems incredibly wasteful. How can I make use of the sparsity to solve this efficiently?


Thanks,

Peder



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Peder Jørgensgaard Olesen
PhD student
Department of Civil and Mechanical Engineering

pjool at mek.dtu.dk<mailto:pjool at mek.dtu.dk>
Koppels Allé
Building 403, room 105
2800 Kgs. Lyngby
www.dtu.dk/english<https://www.dtu.dk/english>


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