petsc-3.7.5 2017-01-01
MatGetDiagonal
Gets the diagonal of a matrix.
Synopsis
#include "petscmat.h"
PetscErrorCode MatGetDiagonal(Mat mat,Vec v)
Logically Collective on Mat and Vec
Input Parameters
| mat | - the matrix
|
| v | - the vector for storing the diagonal
|
Output Parameter
v -the diagonal of the matrix
Note
Currently only correct in parallel for square matrices.
See Also
MatGetRow(), MatGetSubMatrices(), MatGetSubmatrix(), MatGetRowMaxAbs()
Level:intermediate
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages
Examples
src/ksp/pc/examples/tutorials/ex1.c.html
src/ksp/pc/examples/tutorials/ex2.c.html
src/ksp/ksp/examples/tutorials/ex15.c.html
src/ksp/ksp/examples/tutorials/ex52.c.html
src/ksp/ksp/examples/tutorials/ex15f.F.html
src/snes/examples/tutorials/ex70.c.html