:py:mod:`aces.beamset.contourellipse`
=====================================

.. py:module:: aces.beamset.contourellipse

.. autoapi-nested-parse::

   Contains routines for fitting an ellipse to a contour.
   Fitting the set of (x,y) points on the first null to an ellipse uses the code
   from http://nicky.vanforeest.com/misc/fitEllipse/fitEllipse.html
   Also the routine hafLocus to find the locus of points along the half peak level

   Copyright (C) CSIRO 2017



Module Contents
---------------

Classes
~~~~~~~

.. autoapisummary::

   aces.beamset.contourellipse.ContourEllipse



Functions
~~~~~~~~~

.. autoapisummary::

   aces.beamset.contourellipse.greens



.. py:class:: ContourEllipse(params=[])

   Bases: :py:obj:`aces.beamset.model.Model`

   .. py:attribute:: PARAM_NAMES
      :value: ['ell_a', 'ell_b', 'ell_c', 'ell_d', 'ell_f', 'ell_g', 'residual_rms']

      

   .. py:attribute:: NUM_PARAMS

      

   .. py:method:: fit(x, y)


   .. py:method:: _fill_attributes()


   .. py:method:: get_residual_rms()


   .. py:method:: is_good_fit()


   .. py:method:: evaluate(arg)

      For this class, evaluation has no meaning
              


   .. py:method:: get_locus50(arg)

      Returns the locus of (x,y) over the range of
      the input angular arg


   .. py:method:: _evaluate(phi)


   .. py:method:: _get_abcdfg()


   .. py:method:: _get_up_down()


   .. py:method:: _ellipse_center()


   .. py:method:: _ellipse_angle_of_rotation()


   .. py:method:: _ellipse_angle_of_rotation2()


   .. py:method:: _ellipse_axis_length()


   .. py:method:: get_translated(dxy)


   .. py:method:: _calc_residual(x, y)



.. py:function:: greens(seg)