petsc-master 2020-05-26
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TaoMatGetSubMat

Gets a submatrix using the IS

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoMatGetSubMat(Mat M, IS is, Vec v1, TaoSubsetType subset_type, Mat *Msub)

Input Parameters

M - the full matrix (n x n)
is - the index set for the submatrix (both row and column index sets need to be the same)
v1 - work vector of dimension n, needed for TAO_SUBSET_MASK option
subset_type <TAO_SUBSET_SUBVEC,TAO_SUBSET_MASK,TAO_SUBSET_MATRIXFREE> - the method TAO is using for subsetting

Output Parameters

Msub -the submatrix

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