MatDenseGetColumnVecRead#
Gives read-only access to a column of a dense matrix, represented as a Vec.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatDenseGetColumnVecRead(Mat A, PetscInt col, Vec *v)
Collective
Input Parameters#
mat - the Mat object
col - the column index
Output Parameter#
v - the vector
Notes#
The vector is owned by PETSc and users cannot modify it.
Users need to call MatDenseRestoreColumnVecRead() when the vector is no longer needed.
Use MatDenseGetColumnVec() to obtain read-write access or MatDenseGetColumnVecWrite() for write-only access.
See Also#
MATDENSE
, MATDENSECUDA
, MATDENSEHIP
, MatDenseGetColumnVec()
, MatDenseGetColumnVecWrite()
, MatDenseRestoreColumnVec()
, MatDenseRestoreColumnVecRead()
, MatDenseRestoreColumnVecWrite()
Level#
intermediate
Location#
Implementations#
MatDenseGetColumnVecRead_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecRead_MPIDenseHIP in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecRead_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecRead_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu
MatDenseGetColumnVecRead_SeqDense in src/mat/impls/dense/seq/dense.c
MatDenseGetColumnVecRead_SeqDenseHIP in src/mat/impls/dense/seq/hip/densehip.hip.c
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