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<title>Genetic Algorithm Library: Population::SelectionOperations::GaSelectTournament Class Reference</title>
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<div class="navpath"><a class="el" href="namespace_population.html">Population</a>::<a class="el" href="namespace_population_1_1_selection_operations.html">SelectionOperations</a>::<a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_tournament.html">GaSelectTournament</a>
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<h1>Population::SelectionOperations::GaSelectTournament Class Reference</h1><!-- doxytag: class="Population::SelectionOperations::GaSelectTournament" --><!-- doxytag: inherits="Population::SelectionOperations::GaSelectRouletteWheel" --><code>GaSelectTorunament</code> selection is similar to <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html" title="When GaSelectRouletteWheel selection is used chromosomes with better fitness values...">GaSelectRouletteWheel</a> selection. For one place in result set it performs multiple roulette wheel selection before it chooses only one chromosome with best fitness value among selected. This increases probability of selection of chromosome with better fitness value. This selection use GaSelectTorunamentParams class for parameters.
<a href="#_details">More...</a>
<p>
<code>#include <source/SelectionOperations.h></code>
<p>
Inherits <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html">Population::SelectionOperations::GaSelectRouletteWheel</a>.
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<p>
<a href="class_population_1_1_selection_operations_1_1_ga_select_tournament-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual GAL_API void GACALL </td><td class="memItemRight" valign="bottom"><a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_tournament.html#9b4ccc38a64b0df228ff507f1b700e28">operator()</a> (const <a class="el" href="class_population_1_1_ga_population.html">GaPopulation</a> &population, const <a class="el" href="class_population_1_1_ga_selection_params.html">GaSelectionParams</a> &parameters, <a class="el" href="class_population_1_1_ga_selection_result_set.html">GaSelectionResultSet</a> &result) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">More details are given in specification of GaSelectionOperation::operator () method. <a href="#9b4ccc38a64b0df228ff507f1b700e28"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="class_common_1_1_ga_parameters.html">GaParameters</a> *GACALL </td><td class="memItemRight" valign="bottom"><a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_tournament.html#b03d97f5584e3ec5902d958d4cf83001">MakeParameters</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">More details are given in specification of GaOperation::MakeParameters method. <a href="#b03d97f5584e3ec5902d958d4cf83001"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool GACALL </td><td class="memItemRight" valign="bottom"><a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_tournament.html#2e3f380957b3a5efe3b79021a684e245">CheckParameters</a> (const <a class="el" href="class_common_1_1_ga_parameters.html">GaParameters</a> &parameters) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Valid parameters must have selection size and number of selections grater then 0. <a href="#2e3f380957b3a5efe3b79021a684e245"></a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
<code>GaSelectTorunament</code> selection is similar to <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html" title="When GaSelectRouletteWheel selection is used chromosomes with better fitness values...">GaSelectRouletteWheel</a> selection. For one place in result set it performs multiple roulette wheel selection before it chooses only one chromosome with best fitness value among selected. This increases probability of selection of chromosome with better fitness value. This selection use GaSelectTorunamentParams class for parameters.
<p>
This class has no built-in synchronizator, so <code>LOCK_OBJECT</code> and <code>LOCK_THIS_OBJECT</code> macros cannot be used with instances of this class. Because this genetic operation is stateless all public method are thread-safe. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="9b4ccc38a64b0df228ff507f1b700e28"></a><!-- doxytag: member="Population::SelectionOperations::GaSelectTournament::operator()" ref="9b4ccc38a64b0df228ff507f1b700e28" args="(const GaPopulation &population, const GaSelectionParams &parameters, GaSelectionResultSet &result) const " -->
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<td class="memname">void Population::SelectionOperations::GaSelectTournament::operator() </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_population_1_1_ga_population.html">GaPopulation</a> & </td>
<td class="paramname"> <em>population</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="class_population_1_1_ga_selection_params.html">GaSelectionParams</a> & </td>
<td class="paramname"> <em>parameters</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_population_1_1_ga_selection_result_set.html">GaSelectionResultSet</a> & </td>
<td class="paramname"> <em>result</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"> const<code> [virtual]</code></td>
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More details are given in specification of GaSelectionOperation::operator () method.
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This method is thread-safe.
<p>Reimplemented from <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html#04f2dd105556f35310ac2693a16b2a48">Population::SelectionOperations::GaSelectRouletteWheel</a>.</p>
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<a class="anchor" name="b03d97f5584e3ec5902d958d4cf83001"></a><!-- doxytag: member="Population::SelectionOperations::GaSelectTournament::MakeParameters" ref="b03d97f5584e3ec5902d958d4cf83001" args="() const " -->
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<td class="memname">virtual <a class="el" href="class_common_1_1_ga_parameters.html">GaParameters</a>* GACALL Population::SelectionOperations::GaSelectTournament::MakeParameters </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> const<code> [inline, virtual]</code></td>
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<p>
More details are given in specification of GaOperation::MakeParameters method.
<p>
This method is thread-safe. <dl class="return" compact><dt><b>Returns:</b></dt><dd>Method returns new instance of <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_tournament_params.html" title="This class is used by GaSelectTournament selection operations.">GaSelectTournamentParams</a> class.</dd></dl>
<p>Reimplemented from <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html#580d55ac3fa47bb3e9e83b3ef785c7dc">Population::SelectionOperations::GaSelectRouletteWheel</a>.</p>
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<a class="anchor" name="2e3f380957b3a5efe3b79021a684e245"></a><!-- doxytag: member="Population::SelectionOperations::GaSelectTournament::CheckParameters" ref="2e3f380957b3a5efe3b79021a684e245" args="(const GaParameters &parameters) const " -->
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<td class="memname">virtual bool GACALL Population::SelectionOperations::GaSelectTournament::CheckParameters </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_common_1_1_ga_parameters.html">GaParameters</a> & </td>
<td class="paramname"> <em>parameters</em> </td>
<td> ) </td>
<td width="100%"> const<code> [inline, virtual]</code></td>
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<p>
Valid parameters must have selection size and number of selections grater then 0.
<p>
More details are given in specification of GaOperation::CheckParameters method.<p>
This method is thread-safe.
<p>Reimplemented from <a class="el" href="class_population_1_1_selection_operations_1_1_ga_select_roulette_wheel.html#0b70bccaa7fa692b3df58d616b11cb04">Population::SelectionOperations::GaSelectRouletteWheel</a>.</p>
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<hr>The documentation for this class was generated from the following files:<ul>
<li>source/<a class="el" href="_selection_operations_8h.html">SelectionOperations.h</a><li>source/<a class="el" href="_selection_operations_8cpp.html">SelectionOperations.cpp</a></ul>
</div>
<br/><a href="http://www.coolsoft-sd.com/ProductVersion.aspx?vid=9">Genetic Algorithm Library</a><br/><a href="http://www.coolsoft-sd.com/">Coolsoft Software Development</a>
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