PHP 7.2.0 Beta 3 Released

# Lapack::leastSquaresBySVD

(PECL lapack >= 0.1.0)

Lapack::leastSquaresBySVDSolve the linear least squares problem, using SVD

### Descrizione

public static array Lapack::leastSquaresBySVD ( array \$a , array \$b )

Solve the linear least squares problem, find min x in || B - Ax || Returns an array representing x. Expects arrays of arrays, and will return an array of arrays in the dimension B num cols x A num cols. Uses SVD with a divide and conquer algorithm.

a

Matrix A

b

Matrix B

### Valori restituiti

Returns the solution as an array of arrays.

### Esempi

Example #1 Using Lapack::leastSquaresBySVD():

<?php

\$a
= array(
array(
1.44,  -7.84,  -4.39,   4.53),
array(-
9.96,  -0.28,  -3.24,   3.83),
array(-
7.55,   3.24,   6.27,  -6.64),
array(
8.34,   8.09,   5.28,   2.06),
array(
7.08,   2.52,   0.74,  -2.47),
array(-
5.45,  -5.70,  -1.19,   4.70),
);

\$b = array(
array(
8.58,   9.35),
array(
8.26,  -4.43),
array(
8.48,  -0.70),
array(-
5.28,  -0.26),
array(
5.72,  -7.36),
array(
8.93,  -2.52),
);

\$result Lapack::leastSquaresBySVD(\$a\$b);

?>