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92 org.apache.commons.math.optimization</FONT>
93 <BR>
94 Class SimpleVectorialValueChecker</H2>
95 <PRE>
96 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
97 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.math.optimization.SimpleVectorialValueChecker</B>
98 </PRE>
99 <DL>
100 <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/commons/math/optimization/VectorialConvergenceChecker.html" title="interface in org.apache.commons.math.optimization">VectorialConvergenceChecker</A></DD>
101 </DL>
102 <HR>
103 <DL>
104 <DT><PRE>public class <A HREF="../../../../../src-html/org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#line.34"><B>SimpleVectorialValueChecker</B></A><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../../org/apache/commons/math/optimization/VectorialConvergenceChecker.html" title="interface in org.apache.commons.math.optimization">VectorialConvergenceChecker</A></DL>
105 </PRE>
106
107 <P>
108 Simple implementation of the <A HREF="../../../../../org/apache/commons/math/optimization/VectorialConvergenceChecker.html" title="interface in org.apache.commons.math.optimization"><CODE>VectorialConvergenceChecker</CODE></A> interface using
109 only objective function values.
110 <p>
111 Convergence is considered to have been reached if either the relative
112 difference between the objective function values is smaller than a
113 threshold or if either the absolute difference between the objective
114 function values is smaller than another threshold for all vectors elements.
115 </p>
116 <P>
117
118 <P>
119 <DL>
120 <DT><B>Since:</B></DT>
121 <DD>2.0</DD>
122 <DT><B>Version:</B></DT>
123 <DD>$Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $</DD>
124 </DL>
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137 <TR BGCOLOR="white" CLASS="TableRowColor">
138 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#SimpleVectorialValueChecker()">SimpleVectorialValueChecker</A></B>()</CODE>
139
140 <BR>
141 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Build an instance with default threshold.</TD>
142 </TR>
143 <TR BGCOLOR="white" CLASS="TableRowColor">
144 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#SimpleVectorialValueChecker(double, double)">SimpleVectorialValueChecker</A></B>(double&nbsp;relativeThreshold,
145 double&nbsp;absoluteThreshold)</CODE>
146
147 <BR>
148 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Build an instance with a specified threshold.</TD>
149 </TR>
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162 <CODE>&nbsp;boolean</CODE></FONT></TD>
163 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#converged(int, org.apache.commons.math.optimization.VectorialPointValuePair, org.apache.commons.math.optimization.VectorialPointValuePair)">converged</A></B>(int&nbsp;iteration,
164 <A HREF="../../../../../org/apache/commons/math/optimization/VectorialPointValuePair.html" title="class in org.apache.commons.math.optimization">VectorialPointValuePair</A>&nbsp;previous,
165 <A HREF="../../../../../org/apache/commons/math/optimization/VectorialPointValuePair.html" title="class in org.apache.commons.math.optimization">VectorialPointValuePair</A>&nbsp;current)</CODE>
166
167 <BR>
168 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check if the optimization algorithm has converged considering the last points.</TD>
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192
193 <A NAME="SimpleVectorialValueChecker()"><!-- --></A><H3>
194 SimpleVectorialValueChecker</H3>
195 <PRE>
196 public <A HREF="../../../../../src-html/org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#line.50"><B>SimpleVectorialValueChecker</B></A>()</PRE>
197 <DL>
198 <DD>Build an instance with default threshold.
199 <P>
200 </DL>
201 <HR>
202
203 <A NAME="SimpleVectorialValueChecker(double, double)"><!-- --></A><H3>
204 SimpleVectorialValueChecker</H3>
205 <PRE>
206 public <A HREF="../../../../../src-html/org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#line.64"><B>SimpleVectorialValueChecker</B></A>(double&nbsp;relativeThreshold,
207 double&nbsp;absoluteThreshold)</PRE>
208 <DL>
209 <DD>Build an instance with a specified threshold.
210 <p>
211 In order to perform only relative checks, the absolute tolerance
212 must be set to a negative value. In order to perform only absolute
213 checks, the relative tolerance must be set to a negative value.
214 </p>
215 <P>
216 <DL>
217 <DT><B>Parameters:</B><DD><CODE>relativeThreshold</CODE> - relative tolerance threshold<DD><CODE>absoluteThreshold</CODE> - absolute tolerance threshold</DL>
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229
230 <A NAME="converged(int, org.apache.commons.math.optimization.VectorialPointValuePair, org.apache.commons.math.optimization.VectorialPointValuePair)"><!-- --></A><H3>
231 converged</H3>
232 <PRE>
233 public boolean <A HREF="../../../../../src-html/org/apache/commons/math/optimization/SimpleVectorialValueChecker.html#line.71"><B>converged</B></A>(int&nbsp;iteration,
234 <A HREF="../../../../../org/apache/commons/math/optimization/VectorialPointValuePair.html" title="class in org.apache.commons.math.optimization">VectorialPointValuePair</A>&nbsp;previous,
235 <A HREF="../../../../../org/apache/commons/math/optimization/VectorialPointValuePair.html" title="class in org.apache.commons.math.optimization">VectorialPointValuePair</A>&nbsp;current)</PRE>
236 <DL>
237 <DD>Check if the optimization algorithm has converged considering the last points.
238 <p>
239 This method may be called several time from the same algorithm iteration with
240 different points. This can be detected by checking the iteration number at each
241 call if needed. Each time this method is called, the previous and current point
242 correspond to points with the same role at each iteration, so they can be
243 compared. As an example, simplex-based algorithms call this method for all
244 points of the simplex, not only for the best or worst ones.
245 </p>
246 <P>
247 <DD><DL>
248 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/optimization/VectorialConvergenceChecker.html#converged(int, org.apache.commons.math.optimization.VectorialPointValuePair, org.apache.commons.math.optimization.VectorialPointValuePair)">converged</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/optimization/VectorialConvergenceChecker.html" title="interface in org.apache.commons.math.optimization">VectorialConvergenceChecker</A></CODE></DL>
249 </DD>
250 <DD><DL>
251 <DT><B>Parameters:</B><DD><CODE>iteration</CODE> - index of current iteration<DD><CODE>previous</CODE> - point from previous iteration<DD><CODE>current</CODE> - point from current iteration
252 <DT><B>Returns:</B><DD>true if the algorithm is considered to have converged</DL>
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