public function testReduce()
{
$callback = function ($sum, $elem) {
return $sum + $elem;
};
$this->assertEquals(18, $this->A->reduce($callback));
}
/**
* Return P-norm of matrix
*
* @static
* @param Matrix $matrix
* @param number $p
* @return number
*/
public static function pNorm($matrix, $p)
{
$callback = function ($sum, $elem) use($p) {
return $sum + pow(abs($elem), $p);
};
$sum = $matrix->reduce($callback);
return pow($sum, 1 / $p);
}
