VecWhichInactive

Creates an IS based on a set of vectors

Synopsis

#include "petscvec.h"  
PetscErrorCode VecWhichInactive(Vec VecLow, Vec V, Vec D, Vec VecHigh, PetscBool Strong, IS *S)

Collective

Input Parameters

• VecLow - lower bound

• V - Vector to compare

• D - Direction to compare

• VecHigh - higher bound

• Strong - indicator for applying strongly inactive test

Output Parameter

• S - The index set containing the indices i where the bound is inactive

Notes

Creates an index set containing the indices where one of the following holds:

  - VecLow(i)  < V(i) < VecHigh(i)
  - VecLow(i)  = V(i) and D(i) <= 0 (< 0 when Strong is true)
  - VecHigh(i) = V(i) and D(i) >= 0 (> 0 when Strong is true)

See Also

Vec

Level

advanced

Location

src/vec/vec/utils/projection.c

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Index of all Vec routines
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Index of all manual pages