Log Gamma distribution

The probability density function for log Gamma distribution is:

.. math::

f(x,c) = \frac{\exp(c x - \exp(x))}{\Gamma(c)}

for a real number :math:x, c > 0, and :math:\Gamma is the Gamma function.

The following plots show the pdf and cdf:

.. image:: ../../../../tests/imgs/stats/continuous/loggamma/loggammapdf.png :align: center :width: 480

.. image:: ../../../../tests/imgs/stats/continuous/loggamma/loggammacdf.png :align: center :width: 480