petsc-3.4.5 2014-06-29

MatCopy

Copys a matrix to another matrix.

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatCopy(Mat A,Mat B,MatStructure str)

Collective on Mat

Input Parameters

	A	- the matrix
	str	- SAME_NONZERO_PATTERN or DIFFERENT_NONZERO_PATTERN

Output Parameter

B -where the copy is put

Notes

If you use SAME_NONZERO_PATTERN then the two matrices had better have the same nonzero pattern or the routine will crash.

MatCopy() copies the matrix entries of a matrix to another existing matrix (after first zeroing the second matrix). A related routine is MatConvert(), which first creates a new matrix and then copies the data.

Examples