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: /proc/self/root/var/www/cotutilitydash/vendorexcel/markbaker/matrix/examples/ [ drwxrwxr-x ]
name : test.php

 <?php

use Matrix\Matrix;
use Matrix\Decomposition\QR;

include __DIR__ . '/../vendor/autoload.php';

$grid = [
    [0, 1],
    [-1, 0],
];

$targetGrid = [
    [-1],
    [2],
];

$matrix = new Matrix($grid);
$target = new Matrix($targetGrid);

$decomposition = new QR($matrix);

$X = $decomposition->solve($target);

echo 'X', PHP_EOL;
var_export($X->toArray());
echo PHP_EOL;

$resolve = $matrix->multiply($X);

echo 'Resolve', PHP_EOL;
var_export($resolve->toArray());
echo PHP_EOL;