petsc-3.12.5 2020-03-29

MATMPIAIJ

MATMPIAIJ = "mpiaij" - A matrix type to be used for parallel sparse matrices.

Options Database Keys

-mat_type mpiaij -sets the matrix type to "mpiaij" during a call to MatSetFromOptions()

Notes

MatSetValues() may be called for this matrix type with a NULL argument for the numerical values, in this case the values associated with the rows and columns one passes in are set to zero in the matrix

MatSetOptions(,MAT_STRUCTURE_ONLY,PETSC_TRUE) may be called for this matrix type. In this no space is allocated for the nonzero entries and any entries passed with MatSetValues() are ignored

Level

beginner

Location

src/mat/impls/aij/mpi/mpiaij.c

Examples