petsc-3.14.6 2021-03-30
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