weka.classifiers.timeseries.eval

Class DACModule

java.lang.Object

weka.classifiers.timeseries.eval.TSEvalModule

weka.classifiers.timeseries.eval.ErrorModule

weka.classifiers.timeseries.eval.DACModule

public class DACModule
extends ErrorModule

An evaluation module that computes the accuracy of the direction of forecasted values. I.e. the direction accuracy is the number of times the movement of the predicted values matches the movement of the actual values, expressed as a percentage of the number of values predicted.

Version:

$Revision: 45168 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

Constructor Summary

Constructors

Constructor and Description
DACModule()

Method Summary

Methods

Modifier and Type	Method and Description
double[]	calculateMeasure() Calculate the measure that this module represents.
void	evaluateForInstance(List<weka.classifiers.evaluation.NumericPrediction> forecasts, weka.core.Instance inst) Evaluate the given forecast(s) with respect to the given test instance.
String	getDefinition() Return the mathematical formula that this evaluation module computes.
String	getDescription() Return the longer (single sentence) description of this evaluation module
String	getEvalName() Return the short identifying name of this evaluation module

Methods inherited from class weka.classifiers.timeseries.eval.ErrorModule

countsForTargets, getErrorsForTarget, getPredictionsForAllTargets, getPredictionsForTarget, reset, toString, toSummaryString

Methods inherited from class weka.classifiers.timeseries.eval.TSEvalModule

getModule, getModuleList, getTargetFields, setTargetFields

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DACModule

public DACModule()

Method Detail

getEvalName

public String getEvalName()

Return the short identifying name of this evaluation module

Overrides:

getEvalName in class ErrorModule

Returns:

the short identifying name of this evaluation module

getDescription

public String getDescription()

Return the longer (single sentence) description of this evaluation module

Overrides:

getDescription in class ErrorModule

Returns:

the longer description of this module

getDefinition

public String getDefinition()

Return the mathematical formula that this evaluation module computes.

Overrides:

getDefinition in class ErrorModule

Returns:

the mathematical formula that this module computes.

evaluateForInstance

public void evaluateForInstance(List<weka.classifiers.evaluation.NumericPrediction> forecasts,
                       weka.core.Instance inst)
                         throws Exception

Evaluate the given forecast(s) with respect to the given test instance. Targets with missing values are ignored.

Overrides:

evaluateForInstance in class ErrorModule

Parameters:

forecasts - a List of forecasted values. Each element corresponds to one of the targets and is assumed to be in the same order as the list of targets supplied to the setTargetFields() method.

Throws:

Exception - if the evaluation can't be completed for some reason.

calculateMeasure

public double[] calculateMeasure()
                          throws Exception

Calculate the measure that this module represents.

Overrides:

calculateMeasure in class ErrorModule

Returns:

the value of the measure for this module for each of the target(s).

Throws:

Exception - if the measure can't be computed for some reason.