

   TThhee HHjjoorrtthh DDiissttrriibbuuttiioonn

        dhjorth(y, m, s, f)
        phjorth(q, m, s, f)
        hhjorth(y, m, s, f)

   AArrgguummeennttss::

          y: vector of responses.

          q: vector of quantiles.

          m: vector of location parameters.

          s: vector of dispersion parameters.

          f: vector of family parameters.

   DDeessccrriippttiioonn::

        These functions provide information about the Hjorth
        distribution with location parameter equal to `m', dis-
        persion equal to `s', and family parameter equal to
        `f'.  `dhjorth' gives the density, `phjorth' gives the
        distribution function, `hhjorth' gives the hazard func-
        tion.

        The Hjorth distribution has density

        f(y) = (1+s y)^(-f/s) exp(-(y/m)^2/2) (y/m^2+f/(1+s y))

        where m is the location parameter of the distribution,
        s is the dispersion, and f is the family parameter.

   AAuutthhoorr((ss))::

        J.K. Lindsey

   EExxaammpplleess::

        dhjorth(5, 5, 5, 2)
        phjorth(5, 5, 5, 2)

