GaussianKernel (OpenChemLib 2021.2.0 API)

java.lang.Object
- smile.math.kernel.GaussianKernel

All Implemented Interfaces:

java.io.Serializable, MercerKernel<double[]>
```
public class GaussianKernel
extends java.lang.Object
implements MercerKernel<double[]>
```
The Gaussian Mercer Kernel. k(u, v) = e^{-||u-v||² / (2 * σ²)}, where σ > 0 is the scale parameter of the kernel.
The Gaussian kernel is a good choice for a great deal of applications, although sometimes it is remarked as being overused.

Author:

Haifeng Li

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  GaussianKernel(double sigma)
  Constructor.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  double k(double[] x, double[] y)
  Kernel function.
  
  java.lang.String toString()
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - GaussianKernel
```
public GaussianKernel(double sigma)
```
    Constructor.
    
    Parameters:
    
    sigma - the smooth/width parameter of Gaussian kernel.
- Method Detail
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - k
```
public double k(double[] x,
                double[] y)
```
    Description copied from interface: MercerKernel
    
    Kernel function.
    
    Specified by:
    
    k in interface MercerKernel<double[]>