GaussStddevWeight (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- elki.math.linearalgebra.pca.weightfunctions.GaussStddevWeight

All Implemented Interfaces:

WeightFunction
```
public final class GaussStddevWeight
extends java.lang.Object
implements WeightFunction
```
Gaussian weight function, scaled using standard deviation \( \frac{1}{\sqrt{2\pi}} \exp(-\frac{\text{dist}^2}{2\sigma^2}) \)

Since:

0.2

Author:

Erich Schubert

Constructor Summary

Constructors
Constructor Description

GaussStddevWeight()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`getWeight(double distance, double max, double stddev)`	Get Gaussian Weight using standard deviation for scaling. max is ignored.

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

- Constructor Detail
  - GaussStddevWeight
```
public GaussStddevWeight()
```
- Method Detail
  - getWeight
```
public double getWeight(double distance,
                        double max,
                        double stddev)
```
    Get Gaussian Weight using standard deviation for scaling. max is ignored.
    
    Specified by:
    
    getWeight in interface WeightFunction
    
    Parameters:
    
    distance - distance of the query point
    
    max - maximum distance of all included points
    
    stddev - standard deviation (i.e. quadratic mean / RMS) of the included points
    
    Returns:
    
    weight for the query point