petsc-3.4.5 2014-06-29


Sets an option for controling a vector's behavior.


#include "petscvec.h"   
PetscErrorCode  VecSetOption(Vec x,VecOption op,PetscBool flag)
Collective on Vec

Input Parameter

x - the vector
op - the option
flag - turn the option on or off

Supported Options

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

VEC_IGNORE_OFF_PROC_ENTRIES, which causes VecSetValues() to ignore- entries destined to be stored on a separate processor. This can be used to eliminate the global reduction in the VecAssemblyXXXX() if you know that you have only used VecSetValues() to set local elements
VEC_IGNORE_NEGATIVE_INDICES, which means you can pass negative indices- in ix in calls to VecSetValues() or VecGetValues(). These rows are simply ignored.