de.fuberlin.wiwiss.semmf.taxon
Class ExpMilestCalc

java.lang.Object
  de.fuberlin.wiwiss.semmf.taxon.ExpMilestCalc

All Implemented Interfaces:

MilestoneCalculator

public class ExpMilestCalc
extends java.lang.Object
implements MilestoneCalculator

This class is a milestone calculator using an exponential function m(level) = 0.5 * pow (k, level), where k is a parameter passed to the constructor. The milestone values decrease exponentially allong the hierarchy levels.

Version:

1.0 last modified 29.11.2006

Author:

Radoslaw Oldakowski

Field Summary

private float

k Parameter used in the milestone formula (0.5 / Math.pow(k, conceptLevel)) K is a factor larger than 1 that indicates the rate at which the milestone value decreases along the hierarchy.

Constructor Summary

ExpMilestCalc(float k)
Constructor

Method Summary

float[]

calculateMilestones(int deepestLevel) The implementation of this method must return an array of float values for all taxonomy levels starting from 0 and ending at the deepest level.

Methods inherited from class java.lang.Object

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

Field Detail

k

private float k

Parameter used in the milestone formula (0.5 / Math.pow(k, conceptLevel)) K is a factor larger than 1 that indicates the rate at which the milestone value decreases along the hierarchy.

Constructor Detail

ExpMilestCalc

public ExpMilestCalc(float k)

Constructor

Parameters:

k - indicates the rate at which the milestone value decreases along the hierarchy.

Method Detail

calculateMilestones

public float[] calculateMilestones(int deepestLevel)

Description copied from interface: MilestoneCalculator

The implementation of this method must return an array of float values for all taxonomy levels starting from 0 and ending at the deepest level.

Specified by:

calculateMilestones in interface MilestoneCalculator

Parameters:

deepestLevel - index of the deepest level (= number of levels - 1)

Returns:

an array of float values for all taxonomy levels starting from 0 (root element) and ending at the deepest level.