ISGetBlockSize#

Returns the number of elements in a block.

Synopsis#

#include "petscis.h" 
PetscErrorCode ISGetBlockSize(IS is, PetscInt *size)

Not Collective

Input Parameter#

  • is - the index set

Output Parameter#

  • size - the number of elements in a block

Notes#

This is much like the block size for Vecs. It indicates that one can think of the indices as being in a collection of equal size blocks. For ISBlock() these collections of blocks are all contiquous within a block but this is not the case for other IS. ISBlockGetIndices() only works for ISBlock IS, not others.

See Also#

ISBlockGetSize(), ISGetSize(), ISCreateBlock(), ISSetBlockSize()

Level#

intermediate

Location#

src/vec/is/is/interface/index.c

Examples#

src/vec/is/is/tutorials/ex3.c.html
src/vec/is/is/tutorials/ex3f90.F90.html

Edit on GitLab

Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages