📄 generationhistory.htm
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<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">//only
update if necessary</p>
</font><font SIZE="2">
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">if(
!UpdateProperties ) return</font><font SIZE="2"><font face="Courier New">;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">//check
that aggregator and normalizer are set</p>
</font><font SIZE="2">
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">if(
Aggregator == null</font><font SIZE="2"><font face="Courier New">
) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
throw new
InvalidOperationException( "GenerationHistory cannot update fitness</font></p>
<p style="margin-top: 0; margin-bottom: 0">
<font face="Courier New" SIZE="2">
</font><font SIZE="2"><font face="Courier New"> statistics before
the Aggregator property has been set." );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">if(
Normalizer == null</font><font SIZE="2"><font face="Courier New">
) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
throw new
InvalidOperationException( "GenerationHistory cannot update fitness</font></p>
<p style="margin-top: 0; margin-bottom: 0">
<font face="Courier New" SIZE="2">
</font><font SIZE="2"><font face="Courier New"> statistics before
the Normalizer property has been set." );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"> </p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
//aggregate</p>
</font><font SIZE="2">
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
decimal[] aggregatedFitnesses = new decimal</font><font SIZE="2"><font face="Courier New">[Count];</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">int</font><font SIZE="2"><font face="Courier New">
index = 0;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
foreach( HistoryInfo hi in this</font><font SIZE="2"><font face="Courier New">
) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">if</font><font SIZE="2"><font face="Courier New">(
hi.Histories.Empty ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">
throw new
InvalidOperationException( "GenerationHistory cannot update fitness</font></p>
<p style="margin-top: 0; margin-bottom: 0">
<font face="Courier New" SIZE="2">
</font><font SIZE="2"><font face="Courier New">statistics before
Histories have been filled for every individual." );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
aggregatedFitnesses[index] = hi.AggregatedFitness = Aggregator(
hi.Histories );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
++index;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font><font SIZE="2" face="Courier New">//set values to
opposite of calculated value</p>
</font>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( MaximizeFitness ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestFitness = decimal.MinValue;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstFitness = decimal.MaxValue;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> else {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestFitness = decimal.MaxValue;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstFitness = decimal.MinValue;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestIndividual = null;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstIndividual = null;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font><font SIZE="2" face="Courier New">//use average
fitness as the sum while calculating</p>
</font>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_AverageFitness = 0;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font><font SIZE="2" face="Courier New">//normalize and
update stats</p>
</font>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
index = 0;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> decimal workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> foreach( HistoryInfo hi in
this ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
workingFitness = hi.NormalizedFitness = Normalizer(
aggregatedFitnesses[index],</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
aggregatedFitnesses );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_AverageFitness += workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
++index;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( MaximizeFitness ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font><font SIZE="2" face="Courier New">//maximize best
fitness</p>
</font>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( workingFitness > m_BestFitness
) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestFitness = workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestIndividual = hi;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( workingFitness <
m_WorstFitness ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstFitness = workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstIndividual = hi;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> else {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font><font SIZE="2" face="Courier New">//minimize best
fitness</p>
</font>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( workingFitness < m_BestFitness
) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestFitness = workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_BestIndividual = hi;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New"> if( workingFitness >
m_WorstFitness ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstFitness = workingFitness;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_WorstIndividual = hi;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
}</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
m_AverageFitness = m_AverageFitness/Count;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
UpdateProperties = false;</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">}</font></font></td>
</tr>
</table>
</center>
</div>
<p class="dtH4"><font face="Arial"><span style="font-weight: 400">The
Contains method determines whether the collection contains the specified
individual.</span></font></p>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="90%" id="AutoNumber20">
<tr>
<td width="100%"><font SIZE="2">
<p style="margin-top: 0; margin-bottom: 0"></font>
<font SIZE="2" face="Courier New">public bool
Contains( string</font><font SIZE="2"><font face="Courier New">
key ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
</font></font><font SIZE="2" face="Courier New">return</font><font SIZE="2"><font face="Courier New">
InnerDictionary.Contains( key );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">}</font></font></td>
</tr>
</table>
</center>
</div>
<p class="dtH4"><font face="Arial"><span style="font-weight: 400">The CopyTo
method copies the HistoryInfo objects to a one dimensional array.</span></font></p>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="90%" id="AutoNumber21">
<tr>
<td width="100%"><font SIZE="2">
<p style="margin-top: 0; margin-bottom: 0"></font>
<font SIZE="2" face="Courier New">public void CopyTo(
HistoryInfo[] destination, int</font><font SIZE="2"><font face="Courier New">
index ) {</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">
InnerDictionary.CopyTo( destination, index );</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Courier New">}</font></font></td>
</tr>
</table>
</center>
</div>
<p class="dtH4"> </p>
<h4 class="dtH4"><font face="Arial">See Also</font></h4>
<p><font face="Arial"><a href="EngineOptions.htm">EngineOptions</a> |
<a href="../ProblemSpace/Individual.htm">IIndividual</a> | </font></p>
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This software licensed under the
<a href="http://opensource.org/licenses/afl-2.1.php" target="_top">Academic
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