MatFilter

Set all values in the matrix with an absolute value less than or equal to the tolerance to zero, and optionally compress the underlying storage

Synopsis

#include "petscmat.h"  
PetscErrorCode MatFilter(Mat A, PetscReal tol, PetscBool compress, PetscBool keep)

Input Parameters

• A - The matrix

• tol - The zero tolerance

• compress - Whether the storage from the input matrix A should be compressed once values less than or equal to tol are set to zero

• keep - If compress is true and for a given row of A, the diagonal coefficient is less than or equal to tol, indicates whether it should be left in the structure or eliminated as well

See Also

Matrices, Mat, MatCreate(), MatZeroEntries(), MatEliminateZeros(), VecFilter()

Level

intermediate

Location

src/mat/utils/axpy.c

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Index of all Mat routines
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Index of all manual pages