directsum.php

Go to the documentation of this file.

<?php

namespace Matrix;

use Matrix\Operators\DirectSum;

if (!function_exists(__NAMESPACE__ . '\\directsum')) {
    function directsum(...$matrixValues): Matrix
    {
        if (count($matrixValues) < 2) {
            throw new Exception('DirectSum operation requires at least 2 arguments');
        }

        $matrix = array_shift($matrixValues);

        if (is_array($matrix)) {
            $matrix = new Matrix($matrix);
        }
        if (!$matrix instanceof Matrix) {
            throw new Exception('DirectSum arguments must be Matrix or array');
        }

        $result = new DirectSum($matrix);

        foreach ($matrixValues as $matrix) {
            $result->execute($matrix);
        }

        return $result->result();
    }
}