nessai.priors
=============

.. py:module:: nessai.priors

.. autoapi-nested-parse::

   Definitions of common priors in the prime space.

   ..
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Functions
---------

.. autoapisummary::

   nessai.priors.log_uniform_prior
   nessai.priors.log_2d_cartesian_prior
   nessai.priors.log_2d_cartesian_prior_sine
   nessai.priors.log_3d_cartesian_prior


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

.. py:function:: log_uniform_prior(x, xmin=-1, xmax=1)

   
   Unformalised log probability of uniform prior.


   :Parameters:

       **x** : array_like
           Parameter to computed log-prior for

       **xmin** : float, optional
           Lower bound on prior

       **xmax** : float, optional
           Upper bound on prior














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.. py:function:: log_2d_cartesian_prior(x, y, k=np.pi)

   
   Log probability for isotropic 2d Cartesian coordinates.

   Assumes a uniform distribution of angles on [0, k] and a radial component
   drawn from a chi distribution with two degrees of freedom.

   :Parameters:

       **x, y** : array_like
           Cartesian coordinates

       **k** : float
           Range over which the angles used to obtain the Cartesian coordinates
           are defined.














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.. py:function:: log_2d_cartesian_prior_sine(x, y, k=np.pi)

   
   Log probability of Cartesian coordinates for a angle with a sine prior

   Assumes angles drawn for a sine distribution andand a radial component
   drawn from a chi distribution with two degrees of freedom.

   Raises a RuntimeError if the anlges were not defined on the range [0, pi].

   :Parameters:

       **x, y** : array_like
           Cartesian coordinates

       **k** : float
           Must be ``np.pi``. Included for compatibility with the interface for
           angle reparameterisations.














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.. py:function:: log_3d_cartesian_prior(x, y, z)

   
   Log probability for 3d isotropic Cartesian coordinates.

   Assumes an isotropic distribution of angles and a radial component drawn
   from a chi distribution with three degrees of freedom.

   :Parameters:

       **x, y, z** : array_like
           Cartesian coordinates














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