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java.lang.Object | +--weka.attributeSelection.ASEvaluation | +--weka.attributeSelection.AttributeEvaluator | +--weka.attributeSelection.GainRatioAttributeEval
Class for Evaluating attributes individually by measuring gain ratio with respect to the class.
Valid options are:
-M
Treat missing values as a seperate value.
Constructor Summary | |
GainRatioAttributeEval()
Constructor |
Method Summary | |
void |
buildEvaluator(Instances data)
Initializes a gain ratio attribute evaluator. |
double |
evaluateAttribute(int attribute)
evaluates an individual attribute by measuring the gain ratio of the class given the attribute. |
boolean |
getMissingMerge()
get whether missing values are being distributed or not |
String[] |
getOptions()
Gets the current settings of WrapperSubsetEval. |
String |
globalInfo()
Returns a string describing this attribute evaluator |
Enumeration |
listOptions()
Returns an enumeration describing the available options |
static void |
main(String[] args)
Main method for testing this class. |
String |
missingMergeTipText()
Returns the tip text for this property |
protected void |
resetOptions()
reset options to default values |
void |
setMissingMerge(boolean b)
distribute the counts for missing values across observed values |
void |
setOptions(String[] options)
Parses a given list of options. |
String |
toString()
Return a description of the evaluator |
Methods inherited from class weka.attributeSelection.ASEvaluation |
forName, makeCopies, postProcess |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public GainRatioAttributeEval()
Method Detail |
public String globalInfo()
public Enumeration listOptions()
listOptions
in interface OptionHandler
public void setOptions(String[] options) throws Exception
-M
Treat missing values as a seperate value.
setOptions
in interface OptionHandler
options
- the list of options as an array of strings
Exception
- if an option is not supportedpublic String missingMergeTipText()
public void setMissingMerge(boolean b)
b
- true=distribute missing values.public boolean getMissingMerge()
public String[] getOptions()
getOptions
in interface OptionHandler
public void buildEvaluator(Instances data) throws Exception
buildEvaluator
in class ASEvaluation
data
- set of instances serving as training data
Exception
- if the evaluator has not been
generated successfullyprotected void resetOptions()
public double evaluateAttribute(int attribute) throws Exception
evaluateAttribute
in class AttributeEvaluator
attribute
- the index of the attribute to be evaluated
Exception
- if the attribute could not be evaluatedpublic String toString()
toString
in class Object
public static void main(String[] args)
args
- the options
-t training file
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