petsc-3.14.6 2021-03-30

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MatNestGetSubMat

Returns a single, sub-matrix from a nest matrix.

Synopsis

#include "petscmat.h"   
PetscErrorCode  MatNestGetSubMat(Mat A,PetscInt idxm,PetscInt jdxm,Mat *sub)

Not collective

Input Parameters

	A	- nest matrix
	idxm	- index of the matrix within the nest matrix
	jdxm	- index of the matrix within the nest matrix

Output Parameter

sub

- matrix at index idxm,jdxm within the nest matrix

See Also

MatNestGetSize(), MatNestGetSubMats(), MatCreateNest(), MATNEST, MatNestSetSubMat(),
MatNestGetLocalISs(), MatNestGetISs()

Level

developer

Location

src/mat/impls/nest/matnest.c

Implementations

MatNestGetSubMat_Nest in src/mat/impls/nest/matnest.c

Index of all Mat routines
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Index of all manual pages