measurement_gain_matrix
=======================

.. currentmodule:: pyarts3.workspace

.. attribute:: Workspace.measurement_gain_matrix
   :type: ~pyarts3.arts.Matrix
   
   Contribution function (or gain) matrix.
   
   This matrix is the partial derivative of the retrieved state vector with respect to the :attr:`~pyarts3.workspace.Workspace.measurement_vector`.
   
   Usage: Used and set by inversion methods.
   
   
   
   
   .. rubric:: Input to workspace methods
   
   .. hlist::
       :columns: 1
   
       * :func:`~pyarts3.workspace.Workspace.measurement_averaging_kernelCalc` 
       * :func:`~pyarts3.workspace.Workspace.measurement_vector_error_covariance_matrix_observation_systemCalc`
   
   
   .. rubric:: Output from workspace method
   
   .. hlist::
       :columns: 1
   
       * :func:`~pyarts3.workspace.Workspace.OEM`
   
   
   .. rubric:: Related workspace variables
   
   .. hlist::
       :columns: 2
   
       * :attr:`~pyarts3.workspace.Workspace.measurement_averaging_kernel` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_inversion_agenda` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_jacobian` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_jacobian_error` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_sensor` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_vector` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_vector_error` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_vector_error_covariance_matrix` 
       * :attr:`~pyarts3.workspace.Workspace.measurement_vector_fitted`
   
   .. :class:`~pyarts3.arts.Matrix`