%feature("docstring") OT::NormalCopulaFactory
"Normal Copula factory.

Available constructor:
    NormalCopulaFactory()

We note :math:`\Hat{\tau}_n` the Kendall-\ :math:`\tau` of the sample.

The correlation matrix :math:`\mat{R}` is estimated by:

.. math::

    R_{ij} = sin(\frac{\pi}{2}\Hat{\tau}_{n,ij})_{\strut}

See also
--------
DistributionFactory, NormalCopula"
