directedgga.html

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 of the attributes are calculated. It is more likely for attributes with a
 great weight to be selected for generating new attributes. On the other hand
 the probability for removing an attribute from the example set will decrease
 for attributes with great weights. This decreases the amount of needed
 generations drastically. <br/>
 
 Another enhancement in comparison to the original GGA is the addition of
 several generators like the ones for trigonometric or exponential functions.
 In this way a sinple linear working learning scheme which can deliver weights
 can be used as inner operator. If this learner can also estimate its
 performance it is not longer necessary to use a inner cross-validation which
 also decreases learning time. Such a learner is for example the
 <A HREF="../../../../../com/rapidminer/operator/learner/functions/kernel/JMySVMLearner.html" title="class in com.rapidminer.operator.learner.functions.kernel"><CODE>JMySVMLearner</CODE></A> which delivers
 the xi-alpha performance estimation at least for classification tasks. <br/>.
 
 Summarized the advantages of this feature construction algorithm are smaller
 runtimes and smaller attribute sets as result. These attribute sets increase
 performance and can be used to explain the models of more complex learning
 schemes like SVMs. The additional generators allow the construction of
 features which are not possible by the known kernel functions. <br/>
 
 Since this operator does not contain algorithms to extract features from
 value series, it is restricted to example sets with only single attributes.
 For (automatic) feature extraction from values series the value series plugin
 for RapidMiner written by Ingo Mierswa should be used. It is available at
 <code>http://rapid-i.com</code>.
<P>

<P>
<DL>
<DT><B>Version:</B></DT>
  <DD>$Id: DirectedGGA.java,v 1.5 2008/05/09 19:22:54 ingomierswa Exp $</DD>
<DT><B>Author:</B></DT>
  <DD>Ingo Mierswa</DD>
</DL>
<HR>

<P>
<!-- =========== FIELD SUMMARY =========== -->

<A NAME="field_summary"><!-- --></A>
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<B>Field Summary</B></FONT></TH>
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<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/rapidminer/operator/features/construction/DirectedGGA.html#PARAMETER_MAX_GENERATED">PARAMETER_MAX_GENERATED</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The parameter name for &quot;The maximum number of generated attributes per generation.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/rapidminer/operator/features/construction/DirectedGGA.html#PARAMETER_MAX_ORIGINAL">PARAMETER_MAX_ORIGINAL</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The parameter name for &quot;The maximum number of original attributes added per generation.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_com.rapidminer.operator.features.construction.YAGGA2"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class com.rapidminer.operator.features.construction.<A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html" title="class in com.rapidminer.operator.features.construction">YAGGA2</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_ASSOCIATIVE_ATTRIBUTE_MERGING">PARAMETER_ASSOCIATIVE_ATTRIBUTE_MERGING</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_CONSTANT_GENERATION_PROB">PARAMETER_CONSTANT_GENERATION_PROB</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_EQUIVALENCE_EPSILON">PARAMETER_EQUIVALENCE_EPSILON</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_EQUIVALENCE_SAMPLES">PARAMETER_EQUIVALENCE_SAMPLES</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_EQUIVALENCE_USE_STATISTICS">PARAMETER_EQUIVALENCE_USE_STATISTICS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_MAX_CONSTRUCTION_DEPTH">PARAMETER_MAX_CONSTRUCTION_DEPTH</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_REMOVE_EQUIVALENT">PARAMETER_REMOVE_EQUIVALENT</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_REMOVE_USELESS">PARAMETER_REMOVE_USELESS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_RESTRICTIVE_SELECTION">PARAMETER_RESTRICTIVE_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_UNUSED_FUNCTIONS">PARAMETER_UNUSED_FUNCTIONS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_ABSOLUTE_VALUES">PARAMETER_USE_ABSOLUTE_VALUES</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_ATAN">PARAMETER_USE_ATAN</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_COS">PARAMETER_USE_COS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_EXP">PARAMETER_USE_EXP</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_FLOOR_CEIL_FUNCTIONS">PARAMETER_USE_FLOOR_CEIL_FUNCTIONS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_LOG">PARAMETER_USE_LOG</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_MAX">PARAMETER_USE_MAX</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_MIN">PARAMETER_USE_MIN</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_POWER_FUNCTIONS">PARAMETER_USE_POWER_FUNCTIONS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_SGN">PARAMETER_USE_SGN</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_SIN">PARAMETER_USE_SIN</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_SQUARE_ROOTS">PARAMETER_USE_SQUARE_ROOTS</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA2.html#PARAMETER_USE_TAN">PARAMETER_USE_TAN</A></CODE></TD>
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&nbsp;<A NAME="fields_inherited_from_class_com.rapidminer.operator.features.construction.YAGGA"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class com.rapidminer.operator.features.construction.<A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA.html" title="class in com.rapidminer.operator.features.construction">YAGGA</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA.html#PARAMETER_MAX_TOTAL_NUMBER_OF_ATTRIBUTES">PARAMETER_MAX_TOTAL_NUMBER_OF_ATTRIBUTES</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/YAGGA.html#PARAMETER_P_MUTATION">PARAMETER_P_MUTATION</A></CODE></TD>
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</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_com.rapidminer.operator.features.construction.AbstractGeneratingGeneticAlgorithm"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class com.rapidminer.operator.features.construction.<A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html" title="class in com.rapidminer.operator.features.construction">AbstractGeneratingGeneticAlgorithm</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_CROSSOVER_TYPE">PARAMETER_CROSSOVER_TYPE</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_P_CROSSOVER">PARAMETER_P_CROSSOVER</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_P_INITIALIZE">PARAMETER_P_INITIALIZE</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_RECIPROCAL_VALUE">PARAMETER_RECIPROCAL_VALUE</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_USE_DIFF">PARAMETER_USE_DIFF</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_USE_DIV">PARAMETER_USE_DIV</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_USE_MULT">PARAMETER_USE_MULT</A>, <A HREF="../../../../../com/rapidminer/operator/features/construction/AbstractGeneratingGeneticAlgorithm.html#PARAMETER_USE_PLUS">PARAMETER_USE_PLUS</A></CODE></TD>
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&nbsp;<A NAME="fields_inherited_from_class_com.rapidminer.operator.features.selection.AbstractGeneticAlgorithm"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class com.rapidminer.operator.features.selection.<A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html" title="class in com.rapidminer.operator.features.selection">AbstractGeneticAlgorithm</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#BOLTZMANN_SELECTION">BOLTZMANN_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#CUT_SELECTION">CUT_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#NON_DOMINATED_SORTING_SELECTION">NON_DOMINATED_SORTING_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_DYNAMIC_SELECTION_PRESSURE">PARAMETER_DYNAMIC_SELECTION_PRESSURE</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_GENERATIONS_WITHOUT_IMPROVAL">PARAMETER_GENERATIONS_WITHOUT_IMPROVAL</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_KEEP_BEST_INDIVIDUAL">PARAMETER_KEEP_BEST_INDIVIDUAL</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_MAXIMUM_NUMBER_OF_GENERATIONS">PARAMETER_MAXIMUM_NUMBER_OF_GENERATIONS</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_POPULATION_SIZE">PARAMETER_POPULATION_SIZE</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_SELECTION_SCHEME">PARAMETER_SELECTION_SCHEME</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_START_TEMPERATURE">PARAMETER_START_TEMPERATURE</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#PARAMETER_TOURNAMENT_SIZE">PARAMETER_TOURNAMENT_SIZE</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#RANK_SELECTION">RANK_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#ROULETTE_WHEEL">ROULETTE_WHEEL</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#SELECTION_SCHEMES">SELECTION_SCHEMES</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#STOCHASTIC_UNIVERSAL">STOCHASTIC_UNIVERSAL</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#TOURNAMENT_SELECTION">TOURNAMENT_SELECTION</A>, <A HREF="../../../../../com/rapidminer/operator/features/selection/AbstractGeneticAlgorithm.html#UNIFORM_SELECTION">UNIFORM_SELECTION</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="fields_inherited_from_class_com.rapidminer.operator.features.FeatureOperator"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class com.rapidminer.operator.features.<A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html" title="class in com.rapidminer.operator.features">FeatureOperator</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_CONSTRAINT_DRAW_RANGE">PARAMETER_CONSTRAINT_DRAW_RANGE</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_DRAW_DOMINATED_POINTS">PARAMETER_DRAW_DOMINATED_POINTS</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_LOCAL_RANDOM_SEED">PARAMETER_LOCAL_RANDOM_SEED</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_MAXIMAL_FITNESS">PARAMETER_MAXIMAL_FITNESS</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_PLOT_GENERATIONS">PARAMETER_PLOT_GENERATIONS</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_POPULATION_CRITERIA_DATA_FILE">PARAMETER_POPULATION_CRITERIA_DATA_FILE</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_SHOW_POPULATION_PLOTTER">PARAMETER_SHOW_POPULATION_PLOTTER</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_SHOW_STOP_DIALOG">PARAMETER_SHOW_STOP_DIALOG</A>, <A HREF="../../../../../com/rapidminer/operator/features/FeatureOperator.html#PARAMETER_USER_RESULT_INDIVIDUAL_SELECTION">PARAMETER_USER_RESULT_INDIVIDUAL_SELECTION</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<!-- ======== CONSTRUCTOR SUMMARY ======== -->

<A NAME="constructor_summary"><!-- --></A>
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<B>Constructor Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../com/rapidminer/operator/features/construction/DirectedGGA.html#DirectedGGA(com.rapidminer.operator.OperatorDescription)">DirectedGGA</A></B>(<A HREF="../../../../../com/rapidminer/operator/OperatorDescription.html" title="class in com.rapidminer.operator">OperatorDescription</A>&nbsp;description)</CODE>

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