Provided by: libbio-perl-perl_1.7.8-1_all
NAME
Bio::Tools::RandomDistFunctions - A set of routines useful for generating random data in different distributions
SYNOPSIS
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 }
DESCRIPTION
Most of the code is based on the C implementation of these routines in Mike Sanderson's r8s's package. See http://loco.biosci.arizona.edu/r8s/ for information on his software.
FEEDBACK
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AUTHOR - Jason Stajich
Email jason-at-bioperl.org
CONTRIBUTORS
Thanks to Mike Sanderson for assistance in the getting this implementation together.
APPENDIX
The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _ birth_distribution Title : rand_birth_distribution Usage : my $randvar = $dist-> rand_birth_distribution($lambda); 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 rand_geometric_distribution 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 ) rand_exponentional_distribution 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 ) rand_normal_distribution 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