petsc-3.3-p7 2013-05-11


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).


#undef  __FUNCT__
#define __FUNCT__ "MatIJGetImage"
PetscErrorCode MatIJGetImage(Mat A, PetscInt *len, PetscInt **image) 
Not collective

Input parameters

A - pseudograph

Output parameters

len - the length of the image array
image - the image array


See Also

MATIJ, MatIJGetImageIS(), MatIJGetSupport(), MatIJGetMaxRowSize()

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 array.