Gets values from certain locations of a vector. Currently can only get values on the same processor


#include "petscvec.h" 
PetscErrorCode  VecGetValues(Vec x,PetscInt ni,const PetscInt ix[],PetscScalar y[])
Collective on Vec

Input Parameters

x - vector to get values from
ni - number of elements to get
ix - indices where to get them from (in global 1d numbering)

Output Parameter

y -array of values


The user provides the allocated array y; it is NOT allocated in this routine

VecGetValues() gets y[i] = x[ix[i]], for i=0,...,ni-1.

VecAssemblyBegin() and VecAssemblyEnd() MUST be called before calling this

VecGetValues() uses 0-based indices in Fortran as well as in C.

See Also

VecAssemblyBegin(), VecAssemblyEnd(), VecGetValuesLocal(),
VecGetValuesBlocked(), InsertMode, INSERT_VALUES, ADD_VALUES, VecSetValues()

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