smile.math.kernel

Class SparseLaplacianKernel

java.lang.Object

smile.math.kernel.SparseLaplacianKernel

All Implemented Interfaces:

MercerKernel<SparseArray>

public class SparseLaplacianKernel
extends Object
implements MercerKernel<SparseArray>

The Laplacian Kernel. k(u, v) = e^{-||u-v|| / σ}, where σ > 0 is the scale parameter of the kernel.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
SparseLaplacianKernel(double sigma) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	k(SparseArray x, SparseArray y) Kernel function.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SparseLaplacianKernel

public SparseLaplacianKernel(double sigma)

Constructor.

Parameters:

sigma - the smooth/width parameter of Laplacian kernel.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

k

public double k(SparseArray x,
       SparseArray y)

Description copied from interface: MercerKernel

Kernel function.

Specified by:

k in interface MercerKernel<SparseArray>