MatCreateSeqSELL#

Creates a sparse matrix in MATSEQSELL format.

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatCreateSeqSELL(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt rlenmax, const PetscInt rlen[], Mat *A)

Collective

Input Parameters#

comm - MPI communicator, set to PETSC_COMM_SELF
m - number of rows
n - number of columns
rlenmax - maximum number of nonzeros in a row, ignored if rlen is provided
rlen - array containing the number of nonzeros in the various rows (possibly different for each row) or NULL

Output Parameter#

A - the matrix

Notes#

It is recommended that one use the MatCreate(), MatSetType() and/or MatSetFromOptions(), MatXXXXSetPreallocation() paradigm instead of this routine directly. [MatXXXXSetPreallocation() is, for example, MatSeqSELLSetPreallocation()]

Specify the preallocated storage with either rlenmax or rlen (not both). Set rlenmax = PETSC_DEFAULT and rlen = NULL for PETSc to control dynamic memory allocation.

Level#

intermediate

Location#

src/mat/impls/sell/seq/sell.c

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