GMatReorder

Reorders the matrix based on the ordering type provided.

#include "gvec.h" 
int GMatReorder(GMat mat, IS rowIS, IS colIS, PetscTruth sparse, int bw, double frac, double tol, GMat *newmat)

Collective on GMat

mat -The grid matrix to reorder

rowIS -The row permutation, usually obtained from MatGetOrdering()

colIS -The column permutation

sparse -The flag for sparsification

bw -[Optional] The sparsified bandwidth, PETSC_DECIDE gives the default

frac -[Optional] The sparsified fractional bandwidth, 0.0 gives the default

tol -[Optional] The sparsification drop tolerance, 0.0 is the default

newmat -The reordered, and possibly sparsified, matrix

-gmat_order_nonzero_diagonal -

grid matrix, ordering