petsc-3.5.2 2014-09-08
Report Typos and Errors

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