petsc-3.3-p7 2013-05-11

MatIJGetSupportIS

 retrieves the global indices of the graph's vertices of nonzero outdegree (i.e., the global indices of this processor's nonzero rows). If the graph is regarded as a multivalued map on integers, this is the support of the map (i.e., the set of indices with nonempty images).

Synopsis

#undef  __FUNCT__
#define __FUNCT__ "MatIJGetSupportIS"
PetscErrorCode MatIJGetSupportIS(Mat A, IS *supp)
Not collective

Input parameters

A -pseudograph

Output parameters

supp -the support IS

Note

See Also

MATIJ, MatIJGetSupport(), MatIJGetSupportISSupported(), MatIJGetImage()

Level:intermediate
Location:src/mat/impls/ij/matij.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

This operation fails for a nonassembled matrix.- - The caller is responsible for destroying the support IS.