PETSc version 3.15.5

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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

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

Level

intermediate

Location

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

Implementations

MatDenseGetColumnVecWrite_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecWrite_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumnVecWrite_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu
MatDenseGetColumnVecWrite_SeqDense in src/mat/impls/dense/seq/dense.c

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