petsc-3.4.4 2014-03-13

SectionRealNorm

Computes the vector norm.

Synopsis

#include "petscdmmesh.h"   
PetscErrorCode  SectionRealNorm(SectionReal section, DM dm, NormType type, PetscReal *val)
Collective on Section

Input Parameters

section - the real Section
type - one of NORM_1, NORM_2, NORM_INFINITY. Also available NORM_1_AND_2, which computes both norms and stores them in a two element array.

Output Parameter

val -the norm

Notes

    NORM_1 denotes sum_i |x_i|
    NORM_2 denotes sqrt(sum_i (x_i)^2)
    NORM_INFINITY denotes max_i |x_i|

See Also

VecNorm(), SectionRealCreate()

Level:intermediate
Location:
src/dm/impls/mesh/section.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages