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<?php
/*
* Math-Matrix library
*
* @author Ashley Kitson <akitson@zf4.biz>
* @copyright Ashley Kitson, UK, 2014
* @licence GPL V3 or later : http://www.gnu.org/licenses/gpl.html
* @link http://en.wikipedia.org/wiki/Matrix_(mathematics)
*/
namespace Chippyash\Math\Matrix\Derivative\Strategy\Determinant;
use Chippyash\Math\Matrix\NumericMatrix;
use Chippyash\Math\Matrix\Interfaces\DeterminantStrategyInterface;
use Chippyash\Math\Matrix\Decomposition\Lu as dLu;
/**
* LU strategy for matrix determinant
*
*/
class Lu implements DeterminantStrategyInterface
{
/**
* Compute determinant using LU method
* $mA must be
* - square
* This is not checked here - that is done in the determinant derivative class
*
* @param \Chippyash\Matrix\NumericMatrix $mA
*
* @return \Chippyash\Type\Interfaces\NumericTypeInterface
*/
public function determinant(NumericMatrix $mA)
{
$Lu = new dLu();
$det = $Lu->decompose($mA)->Det;
return $det;
}
}