MatProductSetFill

Set an expected fill of the matrix whose values are computed via a matrix-matrix product operation

Synopsis

#include "petscmat.h" 
PetscErrorCode MatProductSetFill(Mat mat, PetscReal fill)

Collective

Input Parameters

• mat - the matrix whose values are to be computed via a matrix-matrix product operation

• fill - expected fill as ratio of nnz(mat)/(nnz(A) + nnz(B) + nnz(C)); use PETSC_DETERMINE or PETSC_CURRENT if you do not have a good estimate. If the product is a dense matrix, this value is not used.

Notes

Use fill of PETSC_DETERMINE to use the default value.

The deprecated PETSC_DEFAULT is also supported to mean use the current value.

See Also

Matrices, MatProduct, PETSC_DETERMINE, Mat, MatProductSetFromOptions(), MatProductSetType(), MatProductSetAlgorithm(), MatProductCreate()

Level

intermediate

Location

src/mat/interface/matproduct.c

Examples

src/tao/pde_constrained/tutorials/parabolic.c

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Index of all manual pages