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<title>EO: eoSymMutate.h Source File</title>
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<a class="el" href="dir_000007.html">contrib</a> / <a class="el" href="dir_000008.html">mathsym</a> / <a class="el" href="dir_000018.html">eo_interface</a></div>
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<h1>eoSymMutate.h</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* </span>
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00002 <span class="comment"> * Copyright (C) 2005 Maarten Keijzer</span>
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00003 <span class="comment"> *</span>
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00004 <span class="comment"> * This program is free software; you can redistribute it and/or modify</span>
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00005 <span class="comment"> * it under the terms of version 2 of the GNU General Public License as </span>
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00006 <span class="comment"> * published by the Free Software Foundation. </span>
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00007 <span class="comment"> *</span>
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00008 <span class="comment"> * This program is distributed in the hope that it will be useful,</span>
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00009 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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00010 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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00011 <span class="comment"> * GNU General Public License for more details.</span>
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00012 <span class="comment"> *</span>
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00013 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
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00014 <span class="comment"> * along with this program; if not, write to the Free Software</span>
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00015 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
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00016 <span class="comment"> */</span>
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00017
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00018 <span class="preprocessor">#ifndef SYMMUTATE_H</span>
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00019 <span class="preprocessor"></span><span class="preprocessor">#define SYMMUTATE_H</span>
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00020 <span class="preprocessor"></span>
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00021 <span class="preprocessor">#include <TreeBuilder.h></span>
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00022 <span class="preprocessor">#include <NodeSelector.h></span>
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00023
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00024 <span class="preprocessor">#include <eoSym.h></span>
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00025 <span class="preprocessor">#include <eoOp.h></span>
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00026
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00027 <span class="keyword">template</span> <<span class="keyword">class</span> EoType>
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00028 <span class="keyword">class </span>eoSymSubtreeMutate : <span class="keyword">public</span> <a class="code" href="classeo_mon_op.html">eoMonOp</a><EoType> {
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00029
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00030 TreeBuilder& subtree_builder;
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00031 <a class="code" href="class_node_selector.html">NodeSelector</a>& node_selector;
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00032 <span class="keyword">public</span> :
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00033
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00034 eoSymSubtreeMutate(TreeBuilder& _subtree_builder, <a class="code" href="class_node_selector.html">NodeSelector</a>& _node_selector)
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00035 : subtree_builder(_subtree_builder), node_selector(_node_selector) {}
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00036
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00037
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00038 <span class="keywordtype">bool</span> <a class="code" href="classeo_u_f.html#a1">operator()</a>(<a class="code" href="classeo_parse_tree.html">EoType</a>& tomutate) {
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00039 <span class="keywordtype">unsigned</span> xover_point = node_selector.select_node(tomutate).idx();
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00040 <span class="comment">// create subtree</span>
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00041 Sym newtree = subtree_builder.build_tree(6, <span class="keyword">true</span>); <span class="comment">// TODO, parameterize</span>
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00042 static_cast<Sym&>(tomutate) = insert_subtree(tomutate, xover_point, newtree);
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00043 <span class="keywordflow">return</span> <span class="keyword">true</span>;
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00044 }
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00045
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00046 };
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00047
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00055 <span class="keyword">extern</span> <span class="keywordtype">bool</span> mutate(Sym& sym, <span class="keywordtype">double</span> p, <span class="keyword">const</span> LanguageTable& table);
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00056
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00057 <span class="keyword">template</span> <<span class="keyword">class</span> EoType>
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00058 <span class="keyword">class </span>eoSymNodeMutate : <span class="keyword">public</span> <a class="code" href="classeo_mon_op.html">eoMonOp</a><EoType> {
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00059
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00060 LanguageTable& table;
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00061 <span class="keywordtype">double</span> own_mutation_rate;
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00062 <span class="keywordtype">bool</span> own_is_rate_absolute;
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00063
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00064
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00065 <span class="keyword">public</span>:
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00066
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00067 <span class="keywordtype">double</span>& mutation_rate;
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00068 <span class="keywordtype">bool</span>& is_rate_absolute;
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00069
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00070 eoSymNodeMutate(LanguageTable& _table)
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00071 : table(_table),
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00072 own_mutation_rate(1.0),
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00073 own_is_rate_absolute(false), <span class="comment">// this means a probability of node mutation of 1/sym.size()</span>
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00074 mutation_rate(own_mutation_rate),
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00075 is_rate_absolute(own_is_rate_absolute)
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00076 {}
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00077
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00078 eoSymNodeMutate(LanguageTable& _table, <span class="keywordtype">double</span>& _mutation_rate, <span class="keywordtype">bool</span>& _is_rate_absolute)
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00079 : table(_table),
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00080 mutation_rate(_mutation_rate),
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00081 is_rate_absolute(_is_rate_absolute)
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00082 {}
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00083
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00084
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00085 <span class="keywordtype">bool</span> <a class="code" href="classeo_u_f.html#a1">operator()</a>(<a class="code" href="classeo_parse_tree.html">EoType</a>& _eo) {
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00086 <span class="keywordtype">double</span> p = mutation_rate;
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00087 <span class="keywordflow">if</span> (!is_rate_absolute) p /= _eo.size();
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00088
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00089 <span class="keywordflow">return</span> mutate(_eo, p, table);
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00090 }
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00091
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00092 };
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00093
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00097 <span class="keyword">extern</span> <span class="keywordtype">bool</span> mutate_constants(Sym& sym, <span class="keywordtype">double</span> stdev);
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00098 <span class="keyword">template</span> <<span class="keyword">class</span> EoType>
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00099 <span class="keyword">class </span>eoSymConstantMutate : <span class="keyword">public</span> <a class="code" href="classeo_mon_op.html">eoMonOp</a><EoType> {
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00100
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00101 <span class="keywordtype">double</span>& stdev;
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00102
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00103
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00104 <span class="keyword">public</span> :
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00105 eoSymConstantMutate(<span class="keywordtype">double</span>& _stdev) : stdev(_stdev) {}
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00106
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00107 <span class="keywordtype">bool</span> <a class="code" href="classeo_u_f.html#a1">operator()</a>(<a class="code" href="classeo_parse_tree.html">EoType</a>& _eo) {
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00108 <span class="keywordflow">return</span> mutate_constants(_eo, stdev);
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00109 }
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00110
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00111
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00112 };
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00113
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00114 <span class="preprocessor">#endif</span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Oct 19 05:06:39 2006 for EO by
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.3.9.1 </small></address>
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