5.3.5. UmfPack SOE

system('UmfPack')

This command is used to construct a sparse system of equations which uses the UmfPack solver.

system('UmfPack', '-useLongIndices')

Pass '-useLongIndices' to use 64-bit indices in UMFPACK instead of the default 32-bit indices.

If symbolic or numeric factorization returns -1, try adding this option.