CenterOfGravity

java.lang.Object
- libai.fuzzy.defuzzifiers.Defuzzifier
- - libai.fuzzy.defuzzifiers.CenterOfGravity

Direct Known Subclasses:

CenterOfArea
```
public class CenterOfGravity
extends Defuzzifier
```
Defuzzifier method that calculates the center of gravity of given function. Formally the center of gravity is Integral(x.f(x)) / Integral(f(x)) for the whole interval. This implementation uses Riemann's sums to calculate the integrals of both functions.

Field Summary
- Fields inherited from class libai.fuzzy.defuzzifiers.Defuzzifier
  COA, COG, MOM

Constructor Summary

Constructors
Constructor Description

CenterOfGravity()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`getValue(java.util.List<java.awt.geom.Point2D.Double> function)`	Implements the center of gravity by calculating the Riemann's sums of the area using the trapezoidal rule.
`protected double`	`riemmanSum(java.util.List<java.awt.geom.Point2D.Double> function)`
`protected double`	`riemmanSum(java.util.List<java.awt.geom.Point2D.Double> function, double maxX)`
`java.lang.String`	`toString()`

Methods inherited from class libai.fuzzy.defuzzifiers.Defuzzifier
fromString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - CenterOfGravity
```
public CenterOfGravity()
```
- Method Detail
  - getValue
```
public double getValue(java.util.List<java.awt.geom.Point2D.Double> function)
```
    Implements the center of gravity by calculating the Riemann's sums of the area using the trapezoidal rule. It assumes the x points are equally spaced across the whole domain of the function.
    
    Specified by:
    
    getValue in class Defuzzifier
    
    Parameters:
    
    function - the list of points [x, f(x)] representing the function to analyze.
    
    Returns:
    
    the center of gravity of the function.
  - riemmanSum
```
protected double riemmanSum(java.util.List<java.awt.geom.Point2D.Double> function)
```
  - riemmanSum
```
protected double riemmanSum(java.util.List<java.awt.geom.Point2D.Double> function,
                            double maxX)
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object