petsc-3.7.7 2017-09-25

MatPermute

Creates a new matrix with rows and columns permuted from the original.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatPermute(Mat mat,IS row,IS col,Mat *B)

Collective on Mat

Input Parameters

	mat	- the matrix to permute
	row	- row permutation, each processor supplies only the permutation for its rows
	col	- column permutation, each processor supplies only the permutation for its columns

Output Parameters

B -the permuted matrix

Note

The index sets map from row/col of permuted matrix to row/col of original matrix. The index sets should be on the same communicator as Mat and have the same local sizes.

Examples