petsc-master 2020-07-09
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TaoVecGetSubVec

Gets a subvector using the IS

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoVecGetSubVec(Vec vfull, IS is, TaoSubsetType reduced_type, PetscReal maskvalue, Vec *vreduced)

Input Parameters

vfull - the full matrix
is - the index set for the subvector
reduced_type - the method TAO is using for subsetting (TAO_SUBSET_SUBVEC, TAO_SUBSET_MASK, TAO_SUBSET_MATRIXFREE)
maskvalue - the value to set the unused vector elements to (for TAO_SUBSET_MASK or TAO_SUBSET_MATRIXFREE)

Output Parameters

vreduced -the subvector

Notes

maskvalue should usually be 0.0, unless a pointwise divide will be used.

Level

developer

Location

src/tao/bound/utils/isutil.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages