MatDiagonalScaleLocal#
Scales columns of a matrix given the scaling values including the ghosted ones.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatDiagonalScaleLocal(Mat mat, Vec diag)
Not Collective
Input Parameters#
mat - the matrix
diag - the diagonal values, including ghost ones
Notes#
Works only for MATMPIAIJ and MATMPIBAIJ matrices
diag is a sequential vector that has a length which is the same as the local (ghosted) length of the vector associated with
the matrix’s ISLocalToGlobalMapping set with MatSetLocalToGlobalMapping().
This allows one to avoid during communication to perform the scaling that must be done with MatDiagonalScale().
See Also#
Matrices, Mat, MatDiagonalScale(), MatSetLocalToGlobalMapping(), ISLocalToGlobalMapping
Level#
developer
Location#
Implementations#
MatDiagonalScaleLocal_MPIAIJ() in src/mat/impls/aij/mpi/mmaij.c
MatDiagonalScaleLocal_MPIBAIJ() in src/mat/impls/baij/mpi/mmbaij.c
MatDiagonalScaleLocal_MPISELL() in src/mat/impls/sell/mpi/mmsell.c
Index of all Mat routines
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Index of all manual pages