Server : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.20 System : Linux st2.domain.com 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 User : apache ( 48) PHP Version : 7.4.20 Disable Function : NONE Directory : /var/www/html/oladi/vendor/markbaker/matrix/classes/src/Functions/ |
<?php
/**
*
* Function code for the matrix trace() function
*
* @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
* @license https://opensource.org/licenses/MIT MIT
*/
namespace Matrix;
/**
* Returns the trace of a matrix or an array.
*
* @param Matrix|array $matrix Matrix or an array to treat as a matrix.
* @return float The trace of the matrix
* @throws Exception If argument isn't a valid matrix or array.
*/
function trace($matrix)
{
if (is_array($matrix)) {
$matrix = new Matrix($matrix);
}
if (!$matrix instanceof Matrix) {
throw new Exception('Must be Matrix or array');
}
return Functions::trace($matrix);
}