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java.lang.Objectweka.attributeSelection.ASEvaluation
weka.attributeSelection.CostSensitiveASEvaluation
weka.attributeSelection.CostSensitiveAttributeEval
public class CostSensitiveAttributeEval
A meta subset evaluator that makes its base subset evaluator cost-sensitive.
Valid options are:-C <cost file name> File name of a cost matrix to use. If this is not supplied, a cost matrix will be loaded on demand. The name of the on-demand file is the relation name of the training data plus ".cost", and the path to the on-demand file is specified with the -N option.
-N <directory> Name of a directory to search for cost files when loading costs on demand (default current directory).
-cost-matrix <matrix> The cost matrix in Matlab single line format.
-S <integer> The seed to use for random number generation.
-W Full name of base evaluator. (default: weka.attributeSelection.ReliefFAttributeEval)
Options specific to evaluator weka.attributeSelection.ReliefFAttributeEval:
-M <num instances> Specify the number of instances to sample when estimating attributes. If not specified, then all instances will be used.
-D <seed> Seed for randomly sampling instances. (Default = 1)
-K <number of neighbours> Number of nearest neighbours (k) used to estimate attribute relevances (Default = 10).
-W Weight nearest neighbours by distance
-A <num> Specify sigma value (used in an exp function to control how quickly weights for more distant instances decrease. Use in conjunction with -W. Sensible value=1/5 to 1/10 of the number of nearest neighbours. (Default = 2)
Field Summary |
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Fields inherited from class weka.attributeSelection.CostSensitiveASEvaluation |
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MATRIX_ON_DEMAND, MATRIX_SUPPLIED, TAGS_MATRIX_SOURCE |
Constructor Summary | |
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CostSensitiveAttributeEval()
Default constructor. |
Method Summary | |
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java.lang.String |
defaultEvaluatorString()
Return the name of the default evaluator. |
double |
evaluateAttribute(int attribute)
Evaluates an individual attribute. |
java.lang.String |
getRevision()
Returns the revision string. |
static void |
main(java.lang.String[] args)
Main method for testing this class. |
void |
setEvaluator(ASEvaluation newEvaluator)
Set the base evaluator. |
Methods inherited from class weka.attributeSelection.CostSensitiveASEvaluation |
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buildEvaluator, costMatrixSourceTipText, costMatrixTipText, evaluatorTipText, getCapabilities, getCostMatrix, getCostMatrixSource, getEvaluator, getOnDemandDirectory, getOptions, getSeed, globalInfo, listOptions, onDemandDirectoryTipText, postProcess, seedTipText, setCostMatrix, setCostMatrixSource, setOnDemandDirectory, setOptions, setSeed, toString |
Methods inherited from class weka.attributeSelection.ASEvaluation |
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forName, makeCopies |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface weka.core.OptionHandler |
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getOptions, listOptions, setOptions |
Constructor Detail |
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public CostSensitiveAttributeEval()
Method Detail |
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public java.lang.String defaultEvaluatorString()
defaultEvaluatorString
in class CostSensitiveASEvaluation
public void setEvaluator(ASEvaluation newEvaluator) throws java.lang.IllegalArgumentException
setEvaluator
in class CostSensitiveASEvaluation
newEvaluator
- the evaluator to use.
java.lang.IllegalArgumentException
- if the evaluator is not an instance of AttributeEvaluatorpublic double evaluateAttribute(int attribute) throws java.lang.Exception
evaluateAttribute
in interface AttributeEvaluator
attribute
- the index of the attribute to be evaluated
java.lang.Exception
- if the attribute could not be evaluatedpublic java.lang.String getRevision()
getRevision
in interface RevisionHandler
getRevision
in class CostSensitiveASEvaluation
public static void main(java.lang.String[] args)
args
- the options
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