cartesian_to_polar
==================

.. py:function:: luminet.spatial.cartesian_to_polar(x: float | numpy.ndarray, y: float | numpy.ndarray) -> float | numpy.ndarray

   Convert cartesian to polar coordinates.

   :Parameters: * **x** (float | :class:`~np.ndarray`) -- x coordinate(s)
                * **y** (float | :class:`~np.ndarray`) -- y coordinate(s)

   :returns: Tuple[float | :class:`~np.ndarray`] -- angle in radians and radius