NAME

Bio::Phylo::Generator - Generator of tree topologies

SYNOPSIS

 use Bio::Phylo::Factory;
 my $fac = Bio::Phylo::Factory->new;
 my $gen = $fac->create_generator;
 my $trees = $gen->gen_rand_pure_birth( 
     '-tips'  => 10, 
     '-model' => 'yule',
     '-trees' => 10,
 );

 # prints 'Bio::Phylo::Forest'
 print ref $trees;

DESCRIPTION

The generator module is used to simulate trees under the Yule, Hey, or equiprobable model.

METHODS

CONSTRUCTOR

new()

Generator constructor.

 Type    : Constructor
 Title   : new
 Usage   : my $gen = Bio::Phylo::Generator->new;
 Function: Initializes a Bio::Phylo::Generator object.
 Returns : A Bio::Phylo::Generator object.
 Args    : NONE

GENERATOR

gen_rand_pure_birth()

This method generates a Bio::Phylo::Forest object populated with Yule/Hey trees.

 Type    : Generator
 Title   : gen_rand_pure_birth
 Usage   : my $trees = $gen->gen_rand_pure_birth(
               '-tips'  => 10, 
               '-model' => 'yule',
               '-trees' => 10,
           );
 Function: Generates markov tree shapes, 
           with branch lengths sampled 
           from a user defined model of 
           clade growth, for a user defined
           number of tips.
 Returns : A Bio::Phylo::Forest object.
 Args    : -tips  => number of terminal nodes,
           -model => either 'yule' or 'hey',
           -trees => number of trees to generate

gen_exp_pure_birth()

This method generates a Bio::Phylo::Forest object populated with Yule/Hey trees whose branch lengths are proportional to the expected waiting times (i.e. not sampled from a distribution).

 Type    : Generator
 Title   : gen_exp_pure_birth
 Usage   : my $trees = $gen->gen_exp_pure_birth(
               '-tips'  => 10, 
               '-model' => 'yule',
               '-trees' => 10,
           );
 Function: Generates markov tree shapes, 
           with branch lengths following 
           the expectation under a user 
           defined model of clade growth, 
           for a user defined number of tips.
 Returns : A Bio::Phylo::Forest object.
 Args    : -tips  => number of terminal nodes,
           -model => either 'yule' or 'hey'
           -trees => number of trees to generate

gen_equiprobable()

This method draws tree shapes at random, such that all shapes are equally probable.

 Type    : Generator
 Title   : gen_equiprobable
 Usage   : my $trees = $gen->gen_equiprobable( 
               '-tips'  => 10, 
               '-trees' => 5,
           );
 Function: Generates an equiprobable tree 
           shape, with branch lengths = 1;
 Returns : A Bio::Phylo::Forest object.
 Args    : -tips  => number of terminal nodes,
           -trees => number of trees to generate

REVISION

 $Id: Generator.pm 841 2009-03-04 23:07:30Z rvos $

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