PETSc version 3.15.5
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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