petsc-3.8.4 2018-03-24
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MatCreateSubMatrixVirtual

 Creates a virtual matrix that acts as a submatrix

Synopsis

#include "petscmat.h" 
PetscErrorCode MatCreateSubMatrixVirtual(Mat A,IS isrow,IS iscol,Mat *newmat)
Collective on Mat

Input Parameters

A - matrix that we will extract a submatrix of
isrow - rows to be present in the submatrix
iscol - columns to be present in the submatrix

Output Parameters

newmat -new matrix

Notes

Most will use MatCreateSubMatrix which provides a more efficient representation if it is available.

See Also

MatCreateSubMatrix(), MatSubMatrixVirtualUpdate()

Level:developer
Location:src/mat/impls/submat/submat.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages