NormType#
determines what type of norm to compute with VecNorm(), VecNormBegin()/VecNormEnd() and MatNorm().
Synopsis#
typedef enum {
NORM_1 = 0,
NORM_2 = 1,
NORM_FROBENIUS = 2,
NORM_INFINITY = 3,
NORM_1_AND_2 = 4
} NormType;
Values#
NORM_1- the one norm, \(||v|| = \sum_i | v_i |\). \(||A|| = \max_j || A_{*j} ||\), maximum column sumNORM_2- the two norm, \(||v|| = sqrt(\sum_i |v_i|^2)\) (vectors only)NORM_FROBENIUS- \(||A|| = sqrt(\sum_{ij} |A_{ij}|^2)\), same asNORM_2for vectorsNORM_INFINITY- \(||v|| = \max_i |v_i|\). \(||A|| = \max_i || A_{i*} ||_1\), maximum row sumNORM_1_AND_2- computes both the 1 and 2 norm of a vector. The values are stored in two adjacentPetscRealmemory locations
Note#
See Also#
Vectors and Parallel Data, Vec, Mat, VecNorm(), VecNormBegin(), VecNormEnd(), MatNorm(), NORM_1,
NORM_2, NORM_FROBENIUS, NORM_INFINITY, NORM_1_AND_2, ReductionType
Level#
beginner
Location#
Examples#
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages