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

• A - a MATSEQDENSE or MATMPIDENSE matrix

• col - column index

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_p.c
src/ts/tutorials/ex20opt_ic.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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Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages