SlicedGetMatrix

Creates a matrix with the correct parallel layout required for computing the Jacobian on a function defined using the informatin in Sliced.

#include "petscda.h"     
#include "petscmat.h"    
PetscErrorCode PETSCDM_DLLEXPORT SlicedGetMatrix(Sliced slice, MatType mtype,Mat *J)

Collective on Sliced

	slice	- the slice object
	mtype	- Supported types are MATSEQAIJ, MATMPIAIJ, MATSEQBAIJ, MATMPIBAIJ, MATSEQSBAIJ, MATMPISBAIJ, or any type which inherits from one of these (such as MATAIJ, MATLUSOL, etc.).

J -matrix with the correct nonzero preallocation (obviously without the correct Jacobian values)

Notes: This properly preallocates the number of nonzeros in the sparse matrix so you do not need to do it yourself.