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#

src/vec/vec/utils/comb.c

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