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Genetic Algorithm Library

, 7 Apr 2012 GPL3 275.6K 25.6K 522
A framework for genetic algorithms
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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>
<p>
<code>#include &lt;source/PopulationOperations.h&gt;</code>
<p>
Inherits <a class="el" href="class_common_1_1_ga_operation.html">Common::GaOperation</a>.
<p>
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>.
<p>

<p>
<a href="class_population_1_1_ga_scaling_operation-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 float GACALL&nbsp;</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> &amp;chromosome, const <a class="el" href="class_population_1_1_ga_population.html">GaPopulation</a> &amp;population, const <a class="el" href="class_population_1_1_ga_scaling_params.html">GaScalingParams</a> &amp;parameters) const =0</td></tr>

<tr><td class="mdescLeft">&nbsp;</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&nbsp;</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">&nbsp;</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&nbsp;</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> &amp;population, const <a class="el" href="class_population_1_1_ga_scaling_params.html">GaScalingParams</a> &amp;parameters) const =0</td></tr>

<tr><td class="mdescLeft">&nbsp;</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. 
<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. 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 &amp;chromosome, const GaPopulation &amp;population, const GaScalingParams &amp;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> &amp;&nbsp;</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> &amp;&nbsp;</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> &amp;&nbsp;</td>
          <td class="paramname"> <em>parameters</em></td><td>&nbsp;</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>
<code>operator ()</code> performs scaling operation and returns scaled fitness value. 
<p>
<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>&nbsp;</td><td>reference to chromosome which fitness is scaled.</td></tr>
    <tr><td valign="top"></td><td valign="top"><em>population</em>&nbsp;</td><td>reference to population which hosts specified chromosome.</td></tr>
    <tr><td valign="top"></td><td valign="top"><em>parameters</em>&nbsp;</td><td>reference to parameters of scaling operation.</td></tr>
  </table>
</dl>
<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>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [pure virtual]</code></td>
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<div class="memdoc">

<p>
<code>IsRankingBased</code> method should return <code>true</code> if scaling of fitness value is based on ranking of chromosome in population. 
<p>
<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 &amp;population, const GaScalingParams &amp;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> &amp;&nbsp;</td>
          <td class="paramname"> <em>population</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="class_population_1_1_ga_scaling_params.html">GaScalingParams</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>parameters</em></td><td>&nbsp;</td>
        </tr>
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          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"> const<code> [pure virtual]</code></td>
        </tr>
      </table>
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<p>
NeedRescaling method checks current population for consistence of chromosomes' scaled fitness values. 
<p>
<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>&nbsp;</td><td>reference to population which is checked.</td></tr>
    <tr><td valign="top"></td><td valign="top"><em>parameters</em>&nbsp;</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>

</div>
</div><p>
<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>
</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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Mladen Janković
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