MatComputeOperator#

Computes the explicit matrix

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatComputeOperator(Mat inmat, MatType mattype, Mat *mat)

Collective

Input Parameters#

  • inmat - the matrix

  • mattype - the matrix type for the explicit operator

Output Parameter#

  • mat - the explicit operator

Note#

This computation is done by applying the operators to columns of the identity matrix. This routine is costly in general, and is recommended for use only with relatively small systems. Currently, this routine uses a dense matrix format if mattype == NULL.

See Also#

Matrices, Mat, MatConvert(), MatMult(), MatComputeOperatorTranspose()

Level#

advanced

Location#

src/mat/utils/axpy.c

Examples#

src/ksp/ksp/tutorials/ex21.c
src/ksp/ksp/tutorials/ex34.c
src/ksp/ksp/tutorials/ex4.c

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Index of all Mat routines
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Index of all manual pages