.. include:: sub.txt

=======
 Radau
=======

.. function:: beamIntegration('Radau',tag,secTag,N)
   :noindex:

   Create a Gauss-Radau beamIntegration object.
   Gauss-Radau integration is not common in force-based elements because it places an integration point at only one end of the element; however, it forms the basis for optimal plastic
   hinge integration methods.

   Places ``N`` Gauss-Radau integration points along the element with a point constrained to be at ndI. The location and weight of each integration point are tabulated in references on
   numerical analysis. The force-deformation response at each integration point is defined
   by the section. The order of accuracy for Gauss-Radau integration is 2N-2.

   Arguments and examples see :ref:`Lobatto-BeamIntegration`.