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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();
}
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