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java.lang.Objectweka.attributeSelection.ASEvaluation
weka.attributeSelection.ChiSquaredAttributeEval
public class ChiSquaredAttributeEval
ChiSquaredAttributeEval :
Evaluates the worth of an attribute by computing the value of the chi-squared statistic with respect to the class.
-M treat missing values as a seperate value.
-B just binarize numeric attributes instead of properly discretizing them.
Discretize
,
NumericToBinary
,
Serialized FormConstructor Summary | |
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ChiSquaredAttributeEval()
Constructor |
Method Summary | |
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java.lang.String |
binarizeNumericAttributesTipText()
Returns the tip text for this property |
void |
buildEvaluator(Instances data)
Initializes a chi-squared attribute evaluator. |
double |
evaluateAttribute(int attribute)
evaluates an individual attribute by measuring its chi-squared value. |
boolean |
getBinarizeNumericAttributes()
get whether numeric attributes are just being binarized. |
Capabilities |
getCapabilities()
Returns the capabilities of this evaluator. |
boolean |
getMissingMerge()
get whether missing values are being distributed or not |
java.lang.String[] |
getOptions()
Gets the current settings. |
java.lang.String |
getRevision()
Returns the revision string. |
java.lang.String |
globalInfo()
Returns a string describing this attribute evaluator |
java.util.Enumeration |
listOptions()
Returns an enumeration describing the available options |
static void |
main(java.lang.String[] args)
Main method. |
java.lang.String |
missingMergeTipText()
Returns the tip text for this property |
void |
setBinarizeNumericAttributes(boolean b)
Binarize numeric attributes. |
void |
setMissingMerge(boolean b)
distribute the counts for missing values across observed values |
void |
setOptions(java.lang.String[] options)
Parses a given list of options. |
java.lang.String |
toString()
Describe the attribute evaluator |
Methods inherited from class weka.attributeSelection.ASEvaluation |
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forName, makeCopies, postProcess |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ChiSquaredAttributeEval()
Method Detail |
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public java.lang.String globalInfo()
public java.util.Enumeration listOptions()
listOptions
in interface OptionHandler
public void setOptions(java.lang.String[] options) throws java.lang.Exception
-M treat missing values as a seperate value.
-B just binarize numeric attributes instead of properly discretizing them.
setOptions
in interface OptionHandler
options
- the list of options as an array of strings
java.lang.Exception
- if an option is not supportedpublic java.lang.String[] getOptions()
getOptions
in interface OptionHandler
public java.lang.String binarizeNumericAttributesTipText()
public void setBinarizeNumericAttributes(boolean b)
b
- true=binarize numeric attributespublic boolean getBinarizeNumericAttributes()
public java.lang.String missingMergeTipText()
public void setMissingMerge(boolean b)
b
- true=distribute missing values.public boolean getMissingMerge()
public Capabilities getCapabilities()
getCapabilities
in interface CapabilitiesHandler
getCapabilities
in class ASEvaluation
Capabilities
public void buildEvaluator(Instances data) throws java.lang.Exception
buildEvaluator
in class ASEvaluation
data
- set of instances serving as training data
java.lang.Exception
- if the evaluator has not been
generated successfullypublic 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 toString()
toString
in class java.lang.Object
public java.lang.String getRevision()
getRevision
in interface RevisionHandler
getRevision
in class ASEvaluation
public static void main(java.lang.String[] args)
args
- the options
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