de.jstacs.algorithms.optimization
Class LimitedMedianStartDistance

java.lang.Object
  de.jstacs.algorithms.optimization.LimitedMedianStartDistance

All Implemented Interfaces:

StartDistanceForecaster

public class LimitedMedianStartDistance
extends Object
implements StartDistanceForecaster

This class implements a StartDistanceForecaster that uses the median of a limited memory over the last values. The method getNewStartDistance() returns 0.667*median.

Author:

Jens Keilwagen

Constructor Summary

LimitedMedianStartDistance(int slots, double value)
This constructor creates an instance with slots memory slots that will initially be filled with value.

Method Summary

double	getNewStartDistance() This method returns the new positive start distance.
void	reset() Resets the object to the initial state.
void	setLastDistance(double last) Sets the last used distance.

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitedMedianStartDistance

public LimitedMedianStartDistance(int slots,
                                  double value)

This constructor creates an instance with slots memory slots that will initially be filled with value.

Parameters:

slots - the number of slots in the memory

value - the initial value for the slots

Method Detail

getNewStartDistance

public double getNewStartDistance()

Description copied from interface: StartDistanceForecaster

This method returns the new positive start distance. It enables the implementor to compute any interpolation using the last values.

Specified by:

getNewStartDistance in interface StartDistanceForecaster

Returns:

the new positive start distance

See Also:

StartDistanceForecaster.setLastDistance(double)

setLastDistance

public void setLastDistance(double last)

Description copied from interface: StartDistanceForecaster

Sets the last used distance.

Specified by:

setLastDistance in interface StartDistanceForecaster

Parameters:

last - the last used distance

reset

public void reset()

Description copied from interface: StartDistanceForecaster

Resets the object to the initial state.

Specified by:

reset in interface StartDistanceForecaster