MatMPISBAIJSetPreallocationCSR#
Creates a sparse parallel matrix in MATMPISBAIJ format using the given nonzero structure and (optional) numerical values
Synopsis#
#include "petscmat.h"
PetscErrorCode MatMPISBAIJSetPreallocationCSR(Mat B, PetscInt bs, const PetscInt i[], const PetscInt j[], const PetscScalar v[])
Collective
Input Parameters#
B - the matrix
bs - the block size
i - the indices into
jfor the start of each local row (indices start with zero)j - the column indices for each local row (indices start with zero) these must be sorted for each row
v - optional values in the matrix, pass
NULLif not provided
Notes#
The i, j, and v arrays ARE copied by this routine into the internal format used by PETSc;
thus you CANNOT change the matrix entries by changing the values of v after you have
called this routine.
Though this routine has Preallocation() in the name it also sets the exact nonzero locations of the matrix entries and usually the numerical values as well
Any entries passed in that are below the diagonal are ignored
See Also#
Matrices, Mat, MATMPISBAIJ, MatCreate(), MatCreateSeqAIJ(), MatSetValues(), MatMPIBAIJSetPreallocation(), MatCreateAIJ(), MATMPIAIJ,
MatCreateMPISBAIJWithArrays()
Level#
advanced
Location#
Implementations#
MatMPISBAIJSetPreallocationCSR_MPISBAIJ() in src/mat/impls/sbaij/mpi/mpisbaij.c
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