smile.math.kernel

Class SparseThinPlateSplineKernel

java.lang.Object

smile.math.kernel.SparseThinPlateSplineKernel

All Implemented Interfaces:

MercerKernel<SparseArray>

public class SparseThinPlateSplineKernel
extends Object
implements MercerKernel<SparseArray>

The Thin Plate Spline Kernel. k(u, v) = (||u-v|| / σ)² log (||u-v|| / σ), where σ > 0 is the scale parameter of the kernel.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
SparseThinPlateSplineKernel(double sigma) Constructor.

Method Summary

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

SparseThinPlateSplineKernel

public SparseThinPlateSplineKernel(double sigma)

Constructor.

Parameters:

sigma - the smooth/width parameter of Thin Plate Spline 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>