get_prior¶
- sherpa.ui.get_prior(par)¶
Return the prior function for a parameter (MCMC).
The default behavior of the pyBLoCXS MCMC sampler (run by the get_draws function) is to use a flat prior for each parameter. The get_prior routine finds the current prior assigned to a parameter, and set_prior is used to change it.
- Parameters
par (a sherpa.models.parameter.Parameter instance) – A parameter of a model instance.
- Returns
The parameter prior set by a previous call to set_prior. This may be a function or model instance.
- Return type
prior
- Raises
ValueError – If a prior has not been set for the parameter.
See also
set_prior
Set the prior function to use with a parameter.
Examples
>>> prior = get_prior(bgnd.c0) >>> print(prior)