public function rowExclude(int $index) : self
    {
        $b = $this->a;

        unset($b[$index]);

        $b = array_values($b);

        return self::quick($b);
    }
public function rowExclude(int $index) : self
    {
        $b = $this->a;

        unset($b[$index]);

        $b = array_values($b);

        return self::quick($b);
    }
public function rowExclude ( int $ index ) : self { $ b = $ this -> a ; unset ( $ b [ $ index ] ) ; $ b = array_values ( $ b ) ; return self :: quick ( $ b ) ; }
Exclude a row from the matrix.

@param int $index
@return self
Exclude a row from the matrix .