Method for obtaining the pdf of a dfr_dist object.
Usage
# S3 method for dfr_dist
pdf(x, ...)Value
A function that computes the pdf of the distribution.
It accepts y, the value at which to compute the pdf, t, the time
at which to compute the pdf, par is the parameters of the
distribution, and log determines whether to compute the log of
the pdf. Finally, it passes any additional arguments ... to
the rate function of the dfr_dist object x.