VecNormBegin#
Starts a split phase norm computation.
Synopsis#
#include "petscvec.h"
PetscErrorCode VecNormBegin(Vec x, NormType ntype, PetscReal *result)
Input Parameters#
x - the first vector
ntype - norm type, one of NORM_1, NORM_2, NORM_MAX, NORM_1_AND_2
result - where the result will go (can be NULL)
Notes#
Each call to VecNormBegin() should be paired with a call to VecNormEnd().
See Also#
VecNormEnd()
, VecNorm()
, VecDot()
, VecMDot()
, VecDotBegin()
, VecDotEnd()
, PetscCommSplitReductionBegin()
Level#
advanced
Location#
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages