petsc-master 2014-11-24
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MatCreateNest

Creates a new matrix containing several nested submatrices, each stored separately

Synopsis

#include "petscmat.h"   
PetscErrorCode MatCreateNest(MPI_Comm comm,PetscInt nr,const IS is_row[],PetscInt nc,const IS is_col[],const Mat a[],Mat *B)
Collective on Mat

Input Parameter

comm - Communicator for the new Mat
nr - number of nested row blocks
is_row - index sets for each nested row block, or NULL to make contiguous
nc - number of nested column blocks
is_col - index sets for each nested column block, or NULL to make contiguous
a - row-aligned array of nr*nc submatrices, empty submatrices can be passed using NULL

Output Parameter

B -new matrix

See Also

MatCreate(), VecCreateNest(), DMCreateMatrix(), MATNEST

Level:advanced
Location:
src/mat/impls/nest/matnest.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex70.c.html