MatDenseGetColumnVecWrite#

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

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatDenseGetColumnVecWrite(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 MatDenseRestoreColumnVecWrite() when the vector is no longer needed.

Use MatDenseGetColumnVec() to obtain read-write access or MatDenseGetColumnVecRead() for read-only access.

See Also#

Matrices, Mat, MATDENSE, MATDENSECUDA, MATDENSEHIP, MatDenseGetColumnVec(), MatDenseGetColumnVecRead(), MatDenseRestoreColumnVec(), MatDenseRestoreColumnVecRead(), MatDenseRestoreColumnVecWrite()

Level#

intermediate

Location#

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

Implementations#

MatDenseGetColumnVecWrite_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecWrite_SeqDense in src/mat/impls/dense/seq/dense.c

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