smile.math.kernel

Class SparseLaplacianKernel

java.lang.Object

smile.math.kernel.SparseLaplacianKernel

All Implemented Interfaces:

java.io.Serializable, MercerKernel<SparseArray>

public class SparseLaplacianKernel
extends java.lang.Object
implements MercerKernel<SparseArray>, java.io.Serializable

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SparseLaplacianKernel(double sigma) Constructor.

Method Summary

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

Methods inherited from class java.lang.Object

equals, 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 java.lang.String toString()

Overrides:

toString in class java.lang.Object

k

public double k(SparseArray x,
                SparseArray y)

Description copied from interface: MercerKernel

Kernel function.

Specified by:

k in interface MercerKernel<SparseArray>