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<?php
use Matrix\Matrix;
use Matrix\Decomposition\QR;
include __DIR__ . '/../vendor/autoload.php';
$grid = [
[1, 2],
[3, 4],
];
$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;