Changing Composite Model Parameters

All Halotools composite models have a param_dict attribute, a python dictionary storing the complete collection of tunable parameters of the model. By altering the values of stored in param_dict, you change the behavior of the model. If you are running an MCMC-type likelihood analysis, your walker should explore the parameter space of (some subset of) the parameters stored in the model param_dict.

For information about how changes in param_dict propagate through Halotools source code, see The param_dict mechanism section of the Composite Model Bookkeeping Mechanisms page in the documentation.