MatSetValuesLocal

Inserts or adds values into certain locations of a matrix, using a local ordering of the nodes.

#include "petscmat.h" 
int MatSetValuesLocal(Mat mat,int nrow,int *irow,int ncol,int *icol,PetscScalar *y,InsertMode addv)

Not Collective

	x	- the matrix
	nrow, irow	- number of rows and their local indices
	ncol, icol	- number of columns and their local indices
	y	- a logically two-dimensional array of values
	addv	- either INSERT_VALUES or ADD_VALUES, where ADD_VALUES adds values to any existing entries, and INSERT_VALUES replaces existing entries with new values

Before calling MatSetValuesLocal(), the user must first set the local-to-global mapping by calling MatSetLocalToGlobalMapping().

Calls to MatSetValuesLocal() with the INSERT_VALUES and ADD_VALUES options cannot be mixed without intervening calls to the assembly routines.

These values may be cached, so MatAssemblyBegin() and MatAssemblyEnd() MUST be called after all calls to MatSetValuesLocal() have been completed.