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<title>EO: rnd_generators.h Source File</title>
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<a class="el" href="dir_000000.html">src</a> / <a class="el" href="dir_000011.html">utils</a></div>
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<h1>rnd_generators.h</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-</span>
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00002 <span class="comment"></span>
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00003 <span class="comment"> -----------------------------------------------------------------------------</span>
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00004 <span class="comment"> rnd_generators.h</span>
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00005 <span class="comment"> Some utility functors for generating random generators:</span>
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00006 <span class="comment"> uniform_generator : generates uniform floats or doubles</span>
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00007 <span class="comment"> random_generator : generates unsigneds, ints etc.</span>
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00008 <span class="comment"> normal_generator : normally distributed floats or doubles</span>
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00009 <span class="comment"></span>
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00010 <span class="comment"> (c) Maarten Keijzer (mak@dhi.dk) and GeNeura Team, 1999, 2000</span>
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00011 <span class="comment"></span>
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00012 <span class="comment"> This library is free software; you can redistribute it and/or</span>
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00013 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
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00014 <span class="comment"> License as published by the Free Software Foundation; either</span>
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00015 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
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00016 <span class="comment"></span>
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00017 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
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00018 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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00019 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
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00020 <span class="comment"> Lesser General Public License for more details.</span>
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00021 <span class="comment"></span>
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00022 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>
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00023 <span class="comment"> License along with this library; if not, write to the Free Software</span>
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00024 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
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00025 <span class="comment"></span>
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00026 <span class="comment"> Contact: todos@geneura.ugr.es, http://geneura.ugr.es</span>
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00027 <span class="comment"> */</span>
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00028
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00029 <span class="comment">//-----------------------------------------------------------------------------</span>
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00030
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00031 <span class="preprocessor">#ifndef eoRND_GENERATORS_H</span>
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00032 <span class="preprocessor"></span><span class="preprocessor">#define eoRND_GENERATORS_H</span>
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00033 <span class="preprocessor"></span>
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00034 <span class="preprocessor">#include "eoRNG.h"</span>
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00035 <span class="preprocessor">#include <stdexcept></span>
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00036
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<a name="l00044"></a><a class="code" href="classuniform__generator.html">00044</a> <span class="keyword">template</span> <<span class="keyword">class</span> T = <span class="keywordtype">double</span>> <span class="keyword">class </span><a class="code" href="classuniform__generator.html">uniform_generator</a>
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00045 {
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00046 <span class="comment">// added new ctor with 2 params, and modified the data to minim and range</span>
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00047 <span class="comment">// (was maxim only). MS 3/11/2000</span>
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00048 <span class="keyword">public</span> :
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00049 <a class="code" href="classuniform__generator.html">uniform_generator</a>(T _max = T(1.0), <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) :
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00050 minim(T(0.0)), range(_max), uniform(_rng) {}
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00051 <a class="code" href="classuniform__generator.html">uniform_generator</a>(T _min, T _max, <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) :
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00052 minim(_min), range(_max-_min), uniform(_rng)
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00053 {
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00054 <span class="keywordflow">if</span> (_min>_max)
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00055 <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"Min is greater than Max in uniform_generator"</span>);
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00056 }
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00057
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00058 T operator()(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> minim+static_cast<T>(uniform.uniform(range)); }
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00059
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00060 <span class="keyword">private</span> :
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00061 T minim;
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00062 T range;
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00063 <a class="code" href="classeo_rng.html">eoRng</a>& uniform;
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00064 };
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00065
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<a name="l00070"></a><a class="code" href="classboolean__generator.html">00070</a> <span class="keyword">class </span><a class="code" href="classboolean__generator.html">boolean_generator</a>
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00071 {
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00072 <span class="keyword">public</span> :
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00073 <a class="code" href="classboolean__generator.html">boolean_generator</a>(<span class="keywordtype">float</span> _bias = 0.5, <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) : bias(_bias), gen(_rng) {}
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00074
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00075 <span class="keywordtype">bool</span> operator()(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> gen.flip(bias); }
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00076 <span class="keyword">private</span> :
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00077 <span class="keywordtype">float</span> bias;
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00078 <a class="code" href="classeo_rng.html">eoRng</a>& gen;
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00079 };
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00080
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<a name="l00087"></a><a class="code" href="classrandom__generator.html">00087</a> <span class="keyword">template</span> <<span class="keyword">class</span> T = u<span class="keywordtype">int</span>32_t> <span class="keyword">class </span><a class="code" href="classrandom__generator.html">random_generator</a>
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00088 {
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00089 <span class="keyword">public</span> :
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00090 <span class="comment">// added new ctor with 2 params, and modified the data to minim and range</span>
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00091 <span class="comment">// (was maxim only). MS 3/11/2000</span>
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00092 <a class="code" href="classrandom__generator.html">random_generator</a>(T _max, <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) :
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00093 minim(T(0.0)), range(_max), random(_rng) {}
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00094 <a class="code" href="classrandom__generator.html">random_generator</a>(T _min, T _max, <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) :
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00095 minim(_min), range(_max-_min), random(_rng)
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00096 {
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00097 <span class="keywordflow">if</span> (_min>_max)
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00098 <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"Min is greater than Max in random_generator"</span>);
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00099 }
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00100
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00101 T operator()(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> (T) (minim + random.random(range)); }
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00102
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00103 <span class="keyword">private</span> :
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00104 T minim;
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00105 T range;
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00106 <a class="code" href="classeo_rng.html">eoRng</a>& random;
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00107 };
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00108
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00110 <span class="keyword">template</span> <>
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00111 <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classrandom__generator.html">random_generator<bool>::operator()</a>(<span class="keywordtype">void</span>)
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00112 {
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00113 <span class="keywordflow">return</span> random.<a class="code" href="classeo_rng.html#a6">flip</a>(0.5);
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00114 }
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00115
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<a name="l00121"></a><a class="code" href="class_u_f__random__generator.html">00121</a> <span class="keyword">template</span> <<span class="keyword">class</span> T = u<span class="keywordtype">int</span>32_t> <span class="keyword">class </span><a class="code" href="class_u_f__random__generator.html">UF_random_generator</a>
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00122 {
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00123 <span class="keyword">public</span> :
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00124 <a class="code" href="class_u_f__random__generator.html">UF_random_generator</a>(<a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) :
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00125 random(_rng) {}
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00126
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00127 T operator()(T _t) { <span class="keywordflow">return</span> (T) (random.random(_t)); }
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00128
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00129 <span class="keyword">private</span> :
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00130 <a class="code" href="classeo_rng.html">eoRng</a>& random;
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00131 };
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00132
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00133
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<a name="l00139"></a><a class="code" href="classnormal__generator.html">00139</a> <span class="keyword">template</span> <<span class="keyword">class</span> T = <span class="keywordtype">double</span>> <span class="keyword">class </span><a class="code" href="classnormal__generator.html">normal_generator</a>
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00140 {
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00141 <span class="keyword">public</span> :
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00142 <a class="code" href="classnormal__generator.html">normal_generator</a>(T _stdev = T(1.0), <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) : stdev(_stdev), normal(_rng) {}
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00143
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00144 T operator()(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> (T) normal.<a class="code" href="classeo_rng.html#a7">normal</a>(stdev); }
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00145
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00146 <span class="keyword">private</span> :
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00147 T stdev;
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00148 <a class="code" href="classeo_rng.html">eoRng</a>& normal;
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00149 };
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00150
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<a name="l00156"></a><a class="code" href="classnegexp__generator.html">00156</a> <span class="keyword">template</span> <<span class="keyword">class</span> T = <span class="keywordtype">double</span>> <span class="keyword">class </span><a class="code" href="classnegexp__generator.html">negexp_generator</a>
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00157 {
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00158 <span class="keyword">public</span> :
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00159 <a class="code" href="classnegexp__generator.html">negexp_generator</a>(T _mean = 1.0, <a class="code" href="classeo_rng.html">eoRng</a>& _rng = rng) : mean(_mean), negexp(_rng) {}
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00160
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00161 T operator()(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> (T) negexp.<a class="code" href="classeo_rng.html#a10">negexp</a>(mean); }
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00162
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00163 <span class="keyword">private</span> :
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00164 T mean;
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00165 <a class="code" href="classeo_rng.html">eoRng</a>& negexp;
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00166 };
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00167
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00168 <span class="preprocessor">#endif</span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Oct 19 05:06:42 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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