MatMatMultSymbolic

Performs construction, preallocation, and computes the ij structure of the matrix-matrix product C=A*B. Call this routine before calling MatMatMultNumeric().

Synopsis

#include "petscmat.h" 
PetscErrorCode MatMatMultSymbolic(Mat A,Mat B,PetscReal fill,Mat *C) 
Collective on Mat

Input Parameters

A - the left matrix
B - the right matrix
fill - expected fill as ratio of nnz(C)/(nnz(A) + nnz(B))

Output Parameters

C -the matrix containing the ij structure of product matrix

Notes

C will be created as a MATSEQAIJ matrix and must be destroyed by the user with MatDestroy().

This routine is currently only implemented for SeqAIJ matrices and classes which inherit from SeqAIJ.

See Also

MatMatMult(),MatMatMultNumeric()

Level:intermediate
Location:
src/mat/impls/aij/seq/matmatmult.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages