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<title>Genetic Algorithm Library: Population::GaScalingOperation Class Reference</title>
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<div class="navpath"><a class="el" href="namespace_population.html">Population</a>::<a class="el" href="class_population_1_1_ga_scaling_operation.html">GaScalingOperation</a>
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<h1>Population::GaScalingOperation Class Reference</h1><!-- doxytag: class="Population::GaScalingOperation" --><!-- doxytag: inherits="Common::GaOperation" -->This class is interface for scaling operations which transform chromosomes' fitness values.
<a href="#_details">More...</a>
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<code>#include <source/PopulationOperations.h></code>
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Inherits <a class="el" href="class_common_1_1_ga_operation.html">Common::GaOperation</a>.
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Inherited by <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_exponential_scaling.html">Population::ScalingOperations::GaExponentialScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_linear_scaling.html">Population::ScalingOperations::GaLinearScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_normalization_scaling.html">Population::ScalingOperations::GaNormalizationScaling</a>, and <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_window_scaling.html">Population::ScalingOperations::GaWindowScaling</a>.
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<a href="class_population_1_1_ga_scaling_operation-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual float GACALL </td><td class="memItemRight" valign="bottom"><a class="el" href="class_population_1_1_ga_scaling_operation.html#308d39177c6c075f6a8d8a8d16ff52b5">operator()</a> (const <a class="el" href="class_chromosome_1_1_ga_scaled_chromosome.html">GaScaledChromosome</a> &chromosome, 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_scaling_params.html">GaScalingParams</a> &parameters) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>operator ()</code> performs scaling operation and returns scaled fitness value. <a href="#308d39177c6c075f6a8d8a8d16ff52b5"></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_ga_scaling_operation.html#715be1b117b5856dae87b60df9b368ab">IsRankingBased</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>IsRankingBased</code> method should return <code>true</code> if scaling of fitness value is based on ranking of chromosome in population. <a href="#715be1b117b5856dae87b60df9b368ab"></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_ga_scaling_operation.html#592fce6744bf6586ea795001f33e6f86">NeedRescaling</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_scaling_params.html">GaScalingParams</a> &parameters) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">NeedRescaling method checks current population for consistence of chromosomes' scaled fitness values. <a href="#592fce6744bf6586ea795001f33e6f86"></a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
This class is interface for scaling operations which transform chromosomes' fitness values.
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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. No public or private methods are thread-safe. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="308d39177c6c075f6a8d8a8d16ff52b5"></a><!-- doxytag: member="Population::GaScalingOperation::operator()" ref="308d39177c6c075f6a8d8a8d16ff52b5" args="(const GaScaledChromosome &chromosome, const GaPopulation &population, const GaScalingParams &parameters) const =0" -->
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<td class="memname">virtual float GACALL Population::GaScalingOperation::operator() </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_chromosome_1_1_ga_scaled_chromosome.html">GaScaledChromosome</a> & </td>
<td class="paramname"> <em>chromosome</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_population.html">GaPopulation</a> & </td>
<td class="paramname"> <em>population</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const <a class="el" href="class_population_1_1_ga_scaling_params.html">GaScalingParams</a> & </td>
<td class="paramname"> <em>parameters</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"> const<code> [pure virtual]</code></td>
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<code>operator ()</code> performs scaling operation and returns scaled fitness value.
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<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>chromosome</em> </td><td>reference to chromosome which fitness is scaled.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>population</em> </td><td>reference to population which hosts specified chromosome.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>parameters</em> </td><td>reference to parameters of scaling operation.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Method returns scaled fitness.</dd></dl>
<p>Implemented in <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_window_scaling.html#c7dde7157eb9a51a17af7afa1d48767b">Population::ScalingOperations::GaWindowScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_exponential_scaling.html#5d5aa57d0953bd3002f58103fa0f26d2">Population::ScalingOperations::GaExponentialScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_linear_scaling.html#48d9d1f3e895974f4b8376f842bec673">Population::ScalingOperations::GaLinearScaling</a>, and <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_normalization_scaling.html#54e389aa0be95e7faed6f6aaecdf1b7f">Population::ScalingOperations::GaNormalizationScaling</a>.</p>
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<a class="anchor" name="715be1b117b5856dae87b60df9b368ab"></a><!-- doxytag: member="Population::GaScalingOperation::IsRankingBased" ref="715be1b117b5856dae87b60df9b368ab" args="() const =0" -->
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<td class="memname">virtual bool GACALL Population::GaScalingOperation::IsRankingBased </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> const<code> [pure virtual]</code></td>
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<p>
<code>IsRankingBased</code> method should return <code>true</code> if scaling of fitness value is based on ranking of chromosome in population.
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Method returns <code>true</code> if scaling operation scales chromosome's fitness based on its ranking in population. If ranking is not used in scaling method should return <code>false</code>.</dd></dl>
<p>Implemented in <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_window_scaling.html#56caef03acb6281954ebdf41a7961949">Population::ScalingOperations::GaWindowScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_exponential_scaling.html#485b615ab59789452826226b25b89f93">Population::ScalingOperations::GaExponentialScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_linear_scaling.html#7bb4a3940b2908b41af1f12d3a8566e8">Population::ScalingOperations::GaLinearScaling</a>, and <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_normalization_scaling.html#288347378a1130b24a8da5e542f503d4">Population::ScalingOperations::GaNormalizationScaling</a>.</p>
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<a class="anchor" name="592fce6744bf6586ea795001f33e6f86"></a><!-- doxytag: member="Population::GaScalingOperation::NeedRescaling" ref="592fce6744bf6586ea795001f33e6f86" args="(const GaPopulation &population, const GaScalingParams &parameters) const =0" -->
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<td class="memname">virtual bool GACALL Population::GaScalingOperation::NeedRescaling </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_scaling_params.html">GaScalingParams</a> & </td>
<td class="paramname"> <em>parameters</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"> const<code> [pure virtual]</code></td>
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<p>
NeedRescaling method checks current population for consistence of chromosomes' scaled fitness values.
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<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>population</em> </td><td>reference to population which is checked.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>parameters</em> </td><td>reference to parameters of scaling operation.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Method returns <code>false</code> if all scaled fitness values of chromosomes are consistent. If rescaling of some or all chromosomes in population should be done, method returns <code>true</code>.</dd></dl>
<p>Implemented in <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_window_scaling.html#01ee8770d21807fc45291603b1ec3357">Population::ScalingOperations::GaWindowScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_exponential_scaling.html#d0489cb753fc769d6a2d9652bdc84b8d">Population::ScalingOperations::GaExponentialScaling</a>, <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_linear_scaling.html#05583f9f487a4494e5896531171c5443">Population::ScalingOperations::GaLinearScaling</a>, and <a class="el" href="class_population_1_1_scaling_operations_1_1_ga_normalization_scaling.html#63111e1922f96ccaeea0375740bc6e69">Population::ScalingOperations::GaNormalizationScaling</a>.</p>
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<hr>The documentation for this class was generated from the following file:<ul>
<li>source/<a class="el" href="_population_operations_8h.html">PopulationOperations.h</a></ul>
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<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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