Provided by: libbio-perl-perl_1.7.2-2_all bug


       Bio::Tools::RandomDistFunctions - A set of routines useful for generating random data in
       different distributions


         use Bio::Tools::RandomDistFunctions;
         my $dist = Bio::Tools::RandomDistFunctions->new();
         for my $v ( 1..1000 ) {
           my $birth_dist = $dist->rand_birth_distribution($lambda);
           # ... do something with the variable


       Most of the code is based on the C implementation of these routines in Mike Sanderson's
       r8s's package.  See for information on his software.


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AUTHOR - Jason Stajich



       Thanks to Mike Sanderson for assistance in the getting this implementation together.


       The rest of the documentation details each of the object methods.  Internal methods are
       usually preceded with a _

        Title   : rand_birth_distribution
        Usage   : my $randvar = $dist->
        Function: Returns a random number from a birth process waiting
                  time with a fixed interval
                  1.0.  Times are measured from 0=present,1=root;
        Returns : floating point number
        Args    : $lambda ( > 0 )
        References : This is based on code by Mike Sanders in r8s.
                     Ross, Stochastic Processes, p. 145 for the density

        Title   : rand_geometric_distribution
        Usage   : my $randvar = $dist->rand_geometric_distribution($param);
        Function: Returns a random geometric variate distributed with
                  parameter $param, according to
                  c.d.f. 1 - ( 1- param) ^ n
        Returns : integer
        Args    : $param ( 0 > $param < 1 )

        Title   : rand_exponentional_distribution
        Usage   : my $var = $dist->rand_exponentional_distribution($param);
        Function: Returns a random exponential variate distributed with parameter
                  $param, according to c.d.f 1 - e^(-param * x)
        Returns : floating point number
        Args    : $param ( > 0 )

        Title   : rand_normal_distribution
        Usage   : my $var = $dist->rand_normal_distribution()
        Function: Returns a random normal (gaussian) variate distributed
        Returns : floating point number
        Args    : none