create a parammod object
parammod(logd, r, t, invt, loggradt, ...)function(params) - log-density function for parameters
function(kappa) - random function to draw parameters
mapping parameter space to real line
mapping real line to parameter space
log of the gradient of mapping t
additional arguments to store in the parammod object
a parammod object
A parameter model is a probability model for a params object.
This class creates a closure with five functions:
- a random method for sampling a params object
- a log-density method for computing the log-density of a given params object
- a transformation function t that maps a parameter value to the real line
- the inverse of t
- the log-gradient of t