public function asColumnMatrix() : Matrix
    {
        $b = [];

        foreach ($this->a as $value) {
            $b[] = [$value];
        }

        return Matrix::quick($b);
    }
public function asColumnMatrix() : Matrix
    {
        $b = [];

        foreach ($this->a as $value) {
            $b[] = [$value];
        }

        return Matrix::quick($b);
    }
public function asColumnMatrix ( ) : Matrix { $ b = [ ] ; foreach ( $ this -> a as $ value ) { $ b [ ] = [ $ value ] ; } return Matrix :: quick ( $ b ) ; }
Return this vector as a column matrix.

@return \Rubix\Tensor\Matrix
Return this vector as a column matrix .