MatDuplicate

Duplicates a matrix including the non-zero structure.

#include "petscmat.h" 
PetscErrorCode  MatDuplicate(Mat mat,MatDuplicateOption op,Mat *M)

Collective on Mat

	mat	- the matrix
	op	- either MAT_DO_NOT_COPY_VALUES or MAT_COPY_VALUES, cause it to copy nonzero values as well or not

M -pointer to place new matrix

	Mat MatDuplicate(Mat A)		->		MatDuplicate(A,MAT_COPY_VALUES,&a); return a;
	Mat MatDuplicate(Mat A,MatDuplicateOption o)		->		MatDuplicate(A,o,&a); return a;