MatFindNonzeroRows

Locate all rows that are not completely zero in the matrix

Synopsis

#include "petscmat.h" 
PetscErrorCode MatFindNonzeroRows(Mat mat, IS *keptrows)

Input Parameter

• mat - the matrix

Output Parameter

• keptrows - the rows that are not completely zero

Note

keptrows is set to NULL if all rows are nonzero.

Developer Note

If keptrows is not NULL, it must be sorted.

See Also

Matrices, Mat, MatFindZeroRows()

Level

intermediate

Location

src/mat/interface/matrix.c

Implementations

MatFindNonzeroRows_MPIAIJ() in src/mat/impls/aij/mpi/mpiaij.c
MatFindNonzeroRows_SeqAIJ() in src/mat/impls/aij/seq/aij.c

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