src/Malenki/Math/Number/Complex.php
public function argument()
    {
        if ($this->original) {
            return $this->original->theta;
        }

        return atan2($this->float_i, $this->float_r);
    }
public function argument()
    {
        if ($this->original) {
            return $this->original->theta;
        }

        return atan2($this->float_i, $this->float_r);
    }
Computes and returns the argument.

@access public
@return float