petsc-3.5.1 2014-08-06
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MatGetTrace

Gets the trace of a matrix. The sum of the diagonal entries.

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatGetTrace(Mat mat,PetscScalar *trace)
Collective on Mat

Input Parameters

mat -the matrix

Output Parameter

trace -the sum of the diagonal entries

Level:advanced
Location:
src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages