MatSetInf

Set every entry (of a given nonzero pattern) of a matrix to positive infinity.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatSetInf(Mat A)

Logically Collective

Input Parameter

• A - the matrix

Notes

Only the dense types (MATSEQDENSE, MATMPIDENSE, and their device variants) currently implement this operation, which is used to flag a block of solutions that a linear solver failed to compute, as VecFlag() does for a single solution.

The state of A is increased, so an outer solver that tracks it detects the failure even when the entries were already infinite.

See Also

Mat, MatZeroEntries(), MatSetValues(), VecFlag()

Level

developer

Location

src/mat/interface/matrix.c

Implementations

MatSetInf_MPIDense() in src/mat/impls/dense/mpi/mpidense.c
MatSetInf_SeqDense() in src/mat/impls/dense/seq/dense.c

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