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<?php /** * * Function code for the matrix direct sum operation * * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix) * @license https://opensource.org/licenses/MIT MIT */ namespace Matrix; use Matrix\Operators\DirectSum; /** * Adds two or more matrices * * @param array<int, mixed> $matrixValues The matrices to add * @return Matrix * @throws Exception */ function directsum(...$matrixValues) { 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(); }