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liefooga 2e7e817428 update docs 
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<h1>moeoSelectors.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">//-----------------------------------------------------------------------------</span>
<a name="l00004"></a>00004 <span class="comment">// moeoSelectors.h</span>
<a name="l00005"></a>00005 <span class="comment">// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007</span>
<a name="l00006"></a>00006 <span class="comment">/*</span>
<a name="l00007"></a>00007 <span class="comment"> This library...</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr</span>
<a name="l00010"></a>00010 <span class="comment"> */</span>
<a name="l00011"></a>00011 <span class="comment">//-----------------------------------------------------------------------------</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#ifndef MOEOSELECTORS_H_</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define MOEOSELECTORS_H_</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include &lt;moeoComparator.h&gt;</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="keyword">template</span> &lt;<span class="keyword">class</span> It,<span class="keyword">class</span> MOEOT&gt;
<a name="l00020"></a>00020 It mo_deterministic_tournament(It _begin, It _end, <span class="keywordtype">unsigned</span> _t_size,<a class="code" href="classmoeoComparator.html">moeoComparator&lt;MOEOT&gt;</a>&amp; _comparator ,<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00021"></a>00021 {
<a name="l00022"></a>00022 It best = _begin + _gen.random(_end - _begin);
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i &lt; _t_size - 1; ++i)
<a name="l00025"></a>00025 {
<a name="l00026"></a>00026 It competitor = _begin + _gen.random(_end - _begin);
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="comment">// compare the two individuals by using the comparator</span>
<a name="l00029"></a>00029 <span class="keywordflow">if</span> (_comparator(*best,*competitor))
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">// best "better" than competitor</span>
<a name="l00032"></a>00032 best=competitor;
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keywordflow">return</span> best;
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00040"></a>00040 <span class="keyword">const</span> MOEOT&amp; mo_deterministic_tournament(<span class="keyword">const</span> <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">unsigned</span> _t_size,<a class="code" href="classmoeoComparator.html">moeoComparator&lt;MOEOT&gt;</a>&amp; _comparator, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="keywordflow">return</span> *mo_deterministic_tournament(_pop.begin(), _pop.end(),_t_size,_comparator, _gen);
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00046"></a>00046 MOEOT&amp; mo_deterministic_tournament(<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">unsigned</span> _t_size,<a class="code" href="classmoeoComparator.html">moeoComparator&lt;MOEOT&gt;</a>&amp; _comparator,<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 <span class="keywordflow">return</span> *mo_deterministic_tournament(_pop.begin(), _pop.end(), _t_size,_comparator, _gen);
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050
<a name="l00051"></a>00051
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="keyword">template</span> &lt;<span class="keyword">class</span> It,<span class="keyword">class</span> MOEOT&gt;
<a name="l00054"></a>00054 It mo_stochastic_tournament(It _begin, It _end, <span class="keywordtype">double</span> _t_rate,<a class="code" href="classmoeoComparator.html">moeoComparator&lt;MOEOT&gt;</a>&amp; _comparator ,<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 It i1 = _begin + _gen.random(_end - _begin);
<a name="l00057"></a>00057 It i2 = _begin + _gen.random(_end - _begin);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordtype">bool</span> return_better = _gen.flip(_t_rate);
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (_comparator(*i1 , *i2))
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (return_better) <span class="keywordflow">return</span> i2;
<a name="l00064"></a>00064 <span class="comment">// else</span>
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keywordflow">return</span> i1;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 <span class="keywordflow">else</span>
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 <span class="keywordflow">if</span> (return_better) <span class="keywordflow">return</span> i1;
<a name="l00071"></a>00071 <span class="comment">// else</span>
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 <span class="comment">// else</span>
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordflow">return</span> i2;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00079"></a>00079 <span class="keyword">const</span> MOEOT&amp; mo_stochastic_tournament(<span class="keyword">const</span> <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">double</span> _t_rate,<a class="code" href="classmoeoComparator.html">moeoComparator&lt;MOEOT&gt;</a>&amp; _comparator, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 <span class="keywordflow">return</span> *mo_stochastic_tournament(_pop.begin(), _pop.end(), _t_rate,_comparator, _gen);
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00085"></a>00085 MOEOT&amp; mo_stochastic_tournament(<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">double</span> _t_rate, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="keywordflow">return</span> *mo_stochastic_tournament(_pop.begin(), _pop.end(), _t_rate, _gen);
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keyword">template</span> &lt;<span class="keyword">class</span> It&gt;
<a name="l00093"></a>00093 It mo_roulette_wheel(It _begin, It _end, <span class="keywordtype">double</span> total, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="keywordtype">float</span> roulette = _gen.uniform(total);
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <span class="keywordflow">if</span> (roulette == 0.0) <span class="comment">// covers the case where total==0.0</span>
<a name="l00099"></a>00099 <span class="keywordflow">return</span> _begin + _gen.random(_end - _begin); <span class="comment">// uniform choice</span>
<a name="l00100"></a>00100
<a name="l00101"></a>00101 It i = _begin;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">while</span> (roulette &gt; 0.0)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 roulette -= static_cast&lt;double&gt;(*(i++));
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">return</span> --i;
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00112"></a>00112 <span class="keyword">const</span> MOEOT&amp; mo_roulette_wheel(<span class="keyword">const</span> <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">double</span> total, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 <span class="keywordtype">float</span> roulette = _gen.uniform(total);
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="keywordflow">if</span> (roulette == 0.0) <span class="comment">// covers the case where total==0.0</span>
<a name="l00117"></a>00117 <span class="keywordflow">return</span> _pop[_gen.random(_pop.size())]; <span class="comment">// uniform choice</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keyword">typename</span> <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;::const_iterator</a> i = _pop.begin();
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="keywordflow">while</span> (roulette &gt; 0.0)
<a name="l00122"></a>00122 {
<a name="l00123"></a>00123 roulette -= static_cast&lt;double&gt;((i++)-&gt;fitness());
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="keywordflow">return</span> *--i;
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="keyword">template</span> &lt;<span class="keyword">class</span> MOEOT&gt;
<a name="l00130"></a>00130 MOEOT&amp; mo_roulette_wheel(<a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;</a>&amp; _pop, <span class="keywordtype">double</span> total, <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_rng.html">eoRng</a>&amp; _gen = rng)
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 <span class="keywordtype">float</span> roulette = _gen.uniform(total);
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (roulette == 0.0) <span class="comment">// covers the case where total==0.0</span>
<a name="l00135"></a>00135 <span class="keywordflow">return</span> _pop[_gen.random(_pop.size())]; <span class="comment">// uniform choice</span>
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="keyword">typename</span> <a class="codeRef" doxygen="eo.doxytag:../../../paradiseo-eo/doc/html/" href="../../../paradiseo-eo/doc/html/classeo_pop.html">eoPop&lt;MOEOT&gt;::iterator</a> i = _pop.begin();
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">while</span> (roulette &gt; 0.0)
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 <span class="comment">// fitness ?</span>
<a name="l00142"></a>00142 roulette -= static_cast&lt;double&gt;((i++)-&gt;fitness());
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="keywordflow">return</span> *--i;
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="preprocessor">#endif </span><span class="comment">/*MOEOSELECTORS_H_*/</span>
<a name="l00149"></a>00149
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