PETSc version 3.17.5

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MatDenseGetColumnVec

Gives read-write access to a column of a dense matrix, represented as a Vec.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatDenseGetColumnVec(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. Users need to call MatDenseRestoreColumnVec() when the vector is no longer needed. Use MatDenseGetColumnVecRead() to obtain read-only access or MatDenseGetColumnVecWrite() for write-only access.

See Also

MATDENSE, MATDENSECUDA, MatDenseGetColumnVecRead(), MatDenseGetColumnVecWrite(), MatDenseRestoreColumnVec(), MatDenseRestoreColumnVecRead(), MatDenseRestoreColumnVecWrite()

Level

intermediate

Location

src/mat/impls/dense/seq/dense.c

Implementations

MatDenseGetColumnVec_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVec_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVec_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu
MatDenseGetColumnVec_SeqDense in src/mat/impls/dense/seq/dense.c

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