

   TThhee LLeevvyy DDiissttrriibbuuttiioonn

        dlevy(y, m, s)
        plevy(q, m, s)

   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.

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

        These functions provide information about the Levy dis-
        tribution with location parameter equal to `m' and dis-
        persion equal to `s'.  `dlevy' gives the density,
        `plevy' gives the distribution function.

        The Levy distribution has density

            f(y) = sqrt(s/(2 pi (y-m)^3)) exp(-s/(2 (y-m)))

        where m is the location parameter of the distribution
        and s is the dispersion, and y>m.

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

        J.K. Lindsey

   SSeeee AAllssoo::

        `dnorm' for the normal distribution and `dcauchy' for
        the Cauchy distribution, two other stable distribu-
        tions.

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

        dlevy(5, 2, 1)
        plevy(5, 2, 1)

