smile.math.kernel

Class BinarySparseThinPlateSplineKernel

java.lang.Object

smile.math.kernel.BinarySparseThinPlateSplineKernel

All Implemented Interfaces:

MercerKernel<int[]>

public class BinarySparseThinPlateSplineKernel
extends Object
implements MercerKernel<int[]>

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. The kernel can work on sparse binary array as int[], which are the indices of nonzero elements.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
BinarySparseThinPlateSplineKernel(double sigma) Constructor.

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

BinarySparseThinPlateSplineKernel

public BinarySparseThinPlateSplineKernel(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(int[] x,
                int[] y)

Description copied from interface: MercerKernel

Kernel function.

Specified by:

k in interface MercerKernel<int[]>