org.android.activityminer.logic.features.calculators
Class FFTEnergyCalculator<T extends Enum<T> & Dimensions>

java.lang.Object
  org.android.activityminer.logic.features.calculators.AbstractCalculator<T,U>
      org.android.activityminer.logic.features.calculators.AbstractCompositeCalculator<T,U>
          org.android.activityminer.logic.features.calculators.AbstractFFTObservationBasedCalculator<T,Double>
              org.android.activityminer.logic.features.calculators.FFTEnergyCalculator<T>

Type Parameters:

T - the enumeration type for the dimensions

All Implemented Interfaces:

EventObserver<FFTCalculatorEvent>, Calculator<Double>, CompositeCalculator<Double>, FFTObservationBasedCalulator<T>

public final class FFTEnergyCalculator<T extends Enum<T> & Dimensions>
extends AbstractFFTObservationBasedCalculator<T,Double>

Implementation of a signal energy from FFT component calculator. The signal energy is calculated as the sum of spectral energies normalized by the observation count.

Field Summary

private double

energySum The signal energySum

Fields inherited from class org.android.activityminer.logic.features.calculators.AbstractCalculator

dimension, value

Constructor Summary

FFTEnergyCalculator(FFTCalculator<T> fftCalculator)
Constructor

Method Summary

Double	getCompositeValue() Does calculate the composite value.
Double	getInitialValue() Method for value initialization.
void	onEvent(ObservableEventSource<? extends FFTCalculatorEvent> eventSource, FFTCalculatorEvent fftComponent)

Methods inherited from class org.android.activityminer.logic.features.calculators.AbstractFFTObservationBasedCalculator

getFFTCalculator, getFFTComponentCount

Methods inherited from class org.android.activityminer.logic.features.calculators.AbstractCompositeCalculator

getValue, reset

Methods inherited from class org.android.activityminer.logic.features.calculators.AbstractCalculator

getDimension

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

energySum

private double energySum

The signal energySum

Constructor Detail

FFTEnergyCalculator

public FFTEnergyCalculator(FFTCalculator<T> fftCalculator)

Constructor

Parameters:

fftCalculator - the FFT Calculator to observe for spectral energy values

Method Detail

getInitialValue

public final Double getInitialValue()

Description copied from interface: Calculator

Method for value initialization.

Returns:

the initialized value

getCompositeValue

public final Double getCompositeValue()

Description copied from interface: CompositeCalculator

Does calculate the composite value.

Specified by:

getCompositeValue in interface CompositeCalculator<Double>

Overrides:

getCompositeValue in class AbstractFFTObservationBasedCalculator<T extends Enum<T> & Dimensions,Double>

Returns:

the composite value

onEvent

public void onEvent(ObservableEventSource<? extends FFTCalculatorEvent> eventSource,
                    FFTCalculatorEvent fftComponent)