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<h2 title="Class TournamentSelection" class="title">Class TournamentSelection</h2>
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<li><a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html" title="class in jcgp.backend.modules.es">jcgp.backend.modules.es.EvolutionaryStrategy</a></li>
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<pre>public class <span class="typeNameLabel">TournamentSelection</span>
extends <a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html" title="class in jcgp.backend.modules.es">EvolutionaryStrategy</a></pre>
<div class="block">Tournament selection
<br><br>
This strategy generates a new population by selecting a specified number
of chromosomes from the original population and selecting the fittest out
of the isolated subset (the tournament). The selected individual is mutated
using the specified mutator. This process is repeated until the new population
is complete.
<br><br>
One integer parameter is used to control this strategy: tournament
size. This must always be greater than 0 and smaller than or equal to the
population size. Setting it to equal population size results in the same
chromosome being selected for every tournament, and setting it to 1 leads
to an effectively random search.
<br>
One additional parameter, report, controls whether a detailed log of the
algorithm's operation is to be printed or not. Reports respect the report
interval base parameter.</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Eduardo Pedroni</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html" title="class in jcgp.backend.modules.es"><code>EvolutionaryStrategy</code></a></dd>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../jcgp/backend/modules/es/TournamentSelection.html#TournamentSelection-jcgp.backend.resources.Resources-">TournamentSelection</a></span>(<a href="../../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a> resources)</code>
<div class="block">Creates a new instance of TournamentSelection.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../jcgp/backend/modules/es/TournamentSelection.html#evolve-jcgp.backend.population.Population-jcgp.backend.modules.mutator.Mutator-">evolve</a></span>(<a href="../../../../jcgp/backend/population/Population.html" title="class in jcgp.backend.population">Population</a> population,
<a href="../../../../jcgp/backend/modules/mutator/Mutator.html" title="class in jcgp.backend.modules.mutator">Mutator</a> mutator)</code>
<div class="block">Performs the selection algorithm and uses the mutator to create
the next generation of solutions.</div>
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<code><a href="../../../../jcgp/backend/modules/Module.html#getLocalParameters--">getLocalParameters</a>, <a href="../../../../jcgp/backend/modules/Module.html#toString--">toString</a></code></li>
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<h4>TournamentSelection</h4>
<pre>public TournamentSelection(<a href="../../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a> resources)</pre>
<div class="block">Creates a new instance of TournamentSelection.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>resources</code> - a reference to the experiment's resources.</dd>
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<h4>evolve</h4>
<pre>public void evolve(<a href="../../../../jcgp/backend/population/Population.html" title="class in jcgp.backend.population">Population</a> population,
<a href="../../../../jcgp/backend/modules/mutator/Mutator.html" title="class in jcgp.backend.modules.mutator">Mutator</a> mutator)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html#evolve-jcgp.backend.population.Population-jcgp.backend.modules.mutator.Mutator-">EvolutionaryStrategy</a></code></span></div>
<div class="block">Performs the selection algorithm and uses the mutator to create
the next generation of solutions.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html#evolve-jcgp.backend.population.Population-jcgp.backend.modules.mutator.Mutator-">evolve</a></code> in class <code><a href="../../../../jcgp/backend/modules/es/EvolutionaryStrategy.html" title="class in jcgp.backend.modules.es">EvolutionaryStrategy</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>population</code> - the population to evolve.</dd>
<dd><code>mutator</code> - the mutator with which to mutate the promoted individuals.</dd>
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