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help for ^gumbel^                                         (STB-43: sg83)
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Parameter estimation for Gumbel distribution
--------------------------------------------

   ^gumbel^  varname [^if^ exp] [^in^ range] [^, it^erate(#) ^lt^ol(#)]


Description
-----------

^gumbel^ estimate the parameters of the Gumbel distribution by using the 
maximum likelihood method. The Output provides estimates of the location
(^lambda^) and scale (^delta^) parameters.


Options
-------

^iterate(^#^)^ specifies the maximum number of iterations allowed in estimating 
    the parameters; ^iterate(100)^ is the default.

^ltol(^#^)^ specifies the convergence criterion for the change in deviance 
    between iterations; ^ltol(1e-5)^ is the default.


Examples
--------

	. ^gumbel varname^

	. ^gumbel varname, iterate(250) ltol(1e-10)^


Authors
-------

      Manuel G. Scotto
      University of Lisbon
      manolo@@naval05.ist.utl.pt
 
      Aurelio Tobias
      Institut Municipal d'Investigacio Medica (IMIM)
      atobias@@imim.es


Reference
---------

Gumbel, E.J. (1958). Statistics of Extremes. New York: Columbia  University
    Press


Also see
--------

     STB:  STB-43 sg83