afe.driver.statistic
====================

.. py:module:: afe.driver.statistic

.. autoapi-nested-parse::

   Analysis of statistics on tensors.



Classes
-------

.. autoapisummary::

   afe.driver.statistic.StatisticInstance
   afe.driver.statistic.Statistic


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

.. py:class:: StatisticInstance



   A collector of statistics on a stream of inputs.
   With an instance of the class, inputs are supplied
   repeatedly by calling update, then the computed result
   is read by calling finish.


   .. py:method:: update(x: _I) -> None
      :abstractmethod:



   .. py:method:: finish() -> _O
      :abstractmethod:



.. py:class:: Statistic



   A method of computing a property over a stream of inputs.
   The property is normally a reduction, e.g., the average of
   the mean squared errors of all inputs.


   .. py:attribute:: initialize
      :type:  Callable[[], _S]


   .. py:attribute:: update
      :type:  Callable[[_S, _I], None]


   .. py:attribute:: finish
      :type:  Callable[[_S], _O]


   .. py:method:: instantiate_type() -> Type[StatisticInstance[_I, _O]]


   .. py:method:: comap(f: Callable[[_A], _I]) -> Statistic[_A, _O]

      Map a function over the input stream.

      :param f: Function to apply to inputs
      :return: Transformed Statistic



   .. py:method:: map(f: Callable[[_O], _A]) -> Statistic[_I, _A]

      Map a function over the output.

      :param f: Function to apply to output
      :return: Transformed Statistic