petsc-3.13.6 2020-09-29
Report Typos and Errors

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

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