Evaluates the log probability density of value given a name of a prior pdf and the corresponding hyperparameters
logd_prior(x, pdf, hypers)
Arguments
x: numeric; vector of values.
pdf: character; name of a probability function. Must conform to base R nomenclature of d/r function pairs. Can include trunc for truncated pdfs from package truncdist.
hypers: list; a list of parameters to be passed to the density function.
Returns
the value of the log density function evaluated at x