petsc-3.3-p7 2013-05-11

MatIJGetImageIS

 retrieves the global indices of the graph's vertices of nonzero indegree on this processor (i.e., the global indices of this processor's nonzero columns). If the graph is regarded as a multivalued map on integers, this is the image of the map (the union of the images of this processor's support indices).

Synopsis

#undef  __FUNCT__
#define __FUNCT__ "MatIJGetImageIS"
PetscErrorCode MatIJGetImageIS(Mat A, IS *image)
Not collective

Input parameters

A -pseudograph

Output parameters

image -image IS

Note

See Also

MatIJGetImage(), MatIJGetSupportIS(), MatIJGetMaxRowSize()

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 freeing the image IS.