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commons-math-2.1 added
author dwinter
date Tue, 04 Jan 2011 10:00:53 +0100
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15 <title>Math - The Commons Math User Guide - Special Functions</title>
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28 Commons Math User Guide
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67 <h5>User Guide</h5>
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95 <strong>Special Functions</strong>
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145 </div>
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149 <div class="section"><h2><a name="a5_Special_Functions"></a>5 Special Functions</h2>
150 <div class="section"><h3><a name="a5.1_Overview"></a>5.1 Overview</h3>
151 <p>
152 The special functions portion of Commons-Math contains several useful functions not
153 provided by <code>java.lang.Math</code>. These functions mostly serve as building blocks
154 for other portions of Commons-Math but, as others may find them useful as stand-alone
155 methods, these special functions were included as part of the Commons-Math public API.
156 </p>
157 </div>
158 <div class="section"><h3><a name="a5.2_Erf_functions"></a>5.2 Erf functions</h3>
159 <p><code>org.apache.commons.math.special.Erf</code> contains several useful functions involving the Error Function, Erf.
160 <table class="bodyTable"><tr class="a"><th>Function</th>
161 <th>Method</th>
162 <th>Reference</th>
163 </tr>
164 <tr class="b"><td>Error Function</td>
165 <td>erf</td>
166 <td>See <a href="http://mathworld.wolfram.com/Erf.html" class="externalLink">Erf</a> from MathWorld</td>
167 </tr>
168 </table>
169 </p>
170 </div>
171 <div class="section"><h3><a name="a5.3_Gamma_functions"></a>5.3 Gamma functions</h3>
172 <p><code>org.apache.commons.math.special.Gamma</code> contains several useful functions involving the Gamma Function.
173 <table class="bodyTable"><tr class="a"><th>Function</th>
174 <th>Method</th>
175 <th>Reference</th>
176 </tr>
177 <tr class="b"><td>Log Gamma</td>
178 <td>logGamma</td>
179 <td>See <a href="http://mathworld.wolfram.com/GammaFunction.html" class="externalLink">Gamma Function</a> from MathWorld</td>
180 </tr>
181 <tr class="a"><td>Regularized Gamma</td>
182 <td>regularizedGammaP</td>
183 <td>See <a href="http://mathworld.wolfram.com/RegularizedGammaFunction.html" class="externalLink">Regularized Gamma Function</a> from MathWorld</td>
184 </tr>
185 </table>
186 </p>
187 </div>
188 <div class="section"><h3><a name="a5.4_Beta_funtions"></a>5.4 Beta funtions</h3>
189 <p><code>org.apache.commons.math.special.Beta</code> contains several useful functions involving the Beta Function.
190 <table class="bodyTable"><tr class="b"><th>Function</th>
191 <th>Method</th>
192 <th>Reference</th>
193 </tr>
194 <tr class="a"><td>Log Beta</td>
195 <td>logBeta</td>
196 <td>See <a href="http://mathworld.wolfram.com/BetaFunction.html" class="externalLink">Beta Function</a> from MathWorld</td>
197 </tr>
198 <tr class="b"><td>Regularized Beta</td>
199 <td>regularizedBeta</td>
200 <td>See <a href="http://mathworld.wolfram.com/RegularizedBetaFunction.html" class="externalLink">Regularized Beta Function</a> from MathWorld</td>
201 </tr>
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