petsc-3.9.4 2018-09-11
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MatComputeExplicitOperator

 Computes the explicit matrix

Synopsis

#include "petscmat.h"  
PetscErrorCode  MatComputeExplicitOperator(Mat inmat,Mat *mat)
Collective on Mat

Input Parameter

inmat -the matrix

Output Parameter

mat -the explict operator

Notes

This computation is done by applying the operators to columns of the identity matrix.

Currently, this routine uses a dense matrix format when 1 processor is used and a sparse format otherwise. This routine is costly in general, and is recommended for use only with relatively small systems.

Keywords

Mat, compute, explicit, operator

Level

advanced

Location

src/mat/utils/axpy.c

Examples

src/ksp/ksp/examples/tutorials/ex34.c.html

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages