SamplingKind.sumsq
==================

.. py:method:: t3toolbox.backend.fitting.SamplingKind.sumsq(out, n_w)
   :abstractmethod:


   .. code-block:: python

      def sumsq(self, out, n_w):


   ``|out|^2`` over ``W`` (and the order / free-mode axes), keeping the frame stack ``C``.