jax.random.loggamma#

jax.random.loggamma(key, a, shape=None, dtype=<class 'float'>)[source]#

Sample log-gamma random values with given shape and float dtype.

This function is implemented such that the following will hold for a dtype-appropriate tolerance:

np.testing.assert_allclose(jnp.exp(loggamma(*args)), gamma(*args), rtol=rtol)

The benefit of log-gamma is that for samples very close to zero (which occur frequently when a << 1) sampling in log space provides better precision.

Parameters:
Return type:

Array

Returns:

A random array with the specified dtype and with shape given by shape if shape is not None, or else by a.shape.

See also

gamma : standard gamma sampler.