petsc-master 2020-08-04
Report Typos and Errors

MatGetColumnVector

Gets the values from a given column of a matrix.

Synopsis

#include "petscmat.h"  
PetscErrorCode  MatGetColumnVector(Mat A,Vec yy,PetscInt col)
Not Collective

Input Parameters

A - the matrix
yy - the vector
col - the column requested (in global numbering)

Notes

If a Mat type does not implement the operation, each processor for which this is called gets the values for its rows using MatGetRow().

The vector must have the same parallel row layout as the matrix.

Contributed by: Denis Vanderstraeten

See Also

MatGetRow(), MatGetDiagonal(), MatMult()

Level

advanced

Location

src/mat/utils/getcolv.c

Implementations

MatGetColumnVector_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatGetColumnVector_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu
MatGetColumnVector_SeqDense in src/mat/impls/dense/seq/dense.c

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages