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#

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

Level#

intermediate

Location#

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

Implementations#

MatDenseGetColumnVecRead_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecRead_SeqDense in src/mat/impls/dense/seq/dense.c

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