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2.1.17.6.6 ocmath_norm2

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

General norm function, for matrix of nRows x nCols

Syntax

double ocmath_norm2( double * pData, uint nRows, uint nCols, int np )

Parameters

pData: [input] pointer to matrix data
nRows: [input] the size of row
nCols: [input] the size of column
np: [input] the types of matrix norms, see stats_type.h for more detail; NORM_LARGEST_SUM = 1 : the largest column sum of matrix or the 1-norm; NORM_LARGEST_SINGULAR = 2 : the largest SVD of matrix; NORM_INFINITY = 3 : the largest row sum of matrix; NORM_FROBEBINUS = 4 : the Frobenius-norm of matrix, sqrt(sum(diag(pData'*pData)))

Return

return the value according to the types of matrix norms, but if nRows or nCols < 1, return NANUM.

Examples

EX1

void ocmath_norm2_ex1()
{
    vector data = {52,234,564,2,3,64,3,546,435,4,5,3};//Generate data
    UINT row = 4, col = 3;//specify the size of row and column of data
    double large_sum = ocmath_norm2(data, row, col, NORM_LARGEST_SUM);// compute the largest sum of column
    printf("The largest sum is %g\n", large_sum);
}

Remark

Header to Include

origin.h