MatDenseGetColumn#

gives access to a column of a dense matrix. This is only the local part of the column. You MUST call MatDenseRestoreColumn() to avoid memory bleeding.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatDenseGetColumn(Mat A, PetscInt col, PetscScalar **vals)

Not Collective

Input Parameters#

Output Parameter#

  • vals - pointer to the data

Note#

Use MatDenseGetColumnVec() to get access to a column of a MATDENSE treated as a Vec

See Also#

Matrices, Mat, MATDENSE, MatDenseRestoreColumn(), MatDenseGetColumnVec()

Level#

intermediate

Location#

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

Examples#

src/ts/tutorials/ex20opt_ic.c
src/ts/tutorials/ex20opt_p.c

Implementations#

MatDenseGetColumn_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatDenseGetColumn_SeqDense in src/mat/impls/dense/seq/dense.c

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