MatCompositeSetMergeType

Sets order of MatCompositeMerge().

Synopsis

#include "petscmat.h" 
PetscErrorCode MatCompositeSetMergeType(Mat mat, MatCompositeMergeType type)

Logically Collective

Input Parameters

• mat - the composite matrix

• type - MAT_COMPOSITE_MERGE RIGHT (default) to start merge from right with the first added matrix (mat[0]), MAT_COMPOSITE_MERGE_LEFT to start merge from left with the last added matrix (mat[nmat-1])

Note

The resulting matrix is the same regardless of the MatCompositeMergeType. Only the order of operation is changed. If set to MAT_COMPOSITE_MERGE_RIGHT the order of the merge is mat[nmat-1](mat[nmat-2](…*(mat[1]*mat[0]))) otherwise the order is (((mat[nmat-1]*mat[nmat-2])mat[nmat-3])…)*mat[0].

See Also

Matrices, Mat, MatCreateComposite(), MatCompositeMerge(), MATCOMPOSITE

Level

advanced

Location

src/mat/impls/composite/mcomposite.c

Examples

src/mat/tutorials/ex9.c

Implementations

MatCompositeSetMergeType_Composite() in src/mat/impls/composite/mcomposite.c

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