petsc-3.12.5 2020-03-29
MatGetRowMaxAbs
Gets the maximum value (in absolute value) of each row of the matrix
Synopsis
#include "petscmat.h"
PetscErrorCode MatGetRowMaxAbs(Mat mat,Vec v,PetscInt idx[])
Logically Collective on Mat
Input Parameters
mat -the matrix
Output Parameter
| v | - the vector for storing the maximums
|
| idx | - the indices of the column found for each row (or NULL if not needed)
|
Notes
if a row is completely empty or has only 0.0 values then the idx[] value for that
row is 0 (the first column).
This code is only implemented for a couple of matrix formats.
See Also
MatGetDiagonal(), MatCreateSubMatrices(), MatCreateSubMatrix(), MatGetRowMax(), MatGetRowMin()
Level
intermediate
Location
src/mat/interface/matrix.c
Examples
src/ksp/ksp/examples/tutorials/ex72.c.html
Implementations
MatGetRowMaxAbs_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatGetRowMaxAbs_SeqAIJ in src/mat/impls/aij/seq/aij.c
MatGetRowMaxAbs_MPIBAIJ in src/mat/impls/baij/mpi/mpibaij.c
MatGetRowMaxAbs_SeqBAIJ in src/mat/impls/baij/seq/baij.c
MatGetRowMaxAbs_SeqDense in src/mat/impls/dense/seq/dense.c
MatGetRowMaxAbs_MPISBAIJ in src/mat/impls/sbaij/mpi/mpisbaij.c
MatGetRowMaxAbs_SeqSBAIJ in src/mat/impls/sbaij/seq/sbaij2.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages