DotProductKernel

All Superinterfaces:: Function, Serializable

All Known Implementing Classes:: BinarySparseHyperbolicTangentKernel, BinarySparseLinearKernel, BinarySparsePolynomialKernel, HyperbolicTangent, HyperbolicTangentKernel, LinearKernel, Polynomial, PolynomialKernel, SparseHyperbolicTangentKernel, SparseLinearKernel, SparsePolynomialKernel

public interface DotProductKernel extends Function

Dot product kernel depends only on the dot product of x and y.

Method Summary

Modifier and Type

Method

Description

default double

apply(double dot)

Computes the kernel function.

default double

f(double dot)

Computes the value of the function at x.

double

k(double dot)

Computes the dot product kernel function.

default Matrix

K(Matrix pdot)

Computes the kernel matrix.

double[]

kg(double dot)

Computes the dot product kernel function and its gradient over hyperparameters.

Methods inherited from interface smile.math.Function
inv

Method Details
- f
  
  default double f(double dot)
  
  Description copied from interface: Function
  
  Computes the value of the function at x.
  
  Specified by:
  
  f in interface Function
  
  Parameters:
  
  dot - a real number.
  
  Returns:
  
  the function value.
- k
  
  double k(double dot)
  
  Computes the dot product kernel function.
  
  Parameters:
  
  dot - the dot product.
  
  Returns:
  
  the kernel value.
- kg
  
  double[] kg(double dot)
  
  Computes the dot product kernel function and its gradient over hyperparameters.
  
  Parameters:
  
  dot - The dot product.
  
  Returns:
  
  the kernel value and gradient.
- apply
  
  default double apply(double dot)
  
  Computes the kernel function. This is simply for Scala convenience.
  
  Specified by:
  
  apply in interface Function
  
  Parameters:
  
  dot - the dot product.
  
  Returns:
  
  the kernel value.
- K
  
  default Matrix K(Matrix pdot)
  
  Computes the kernel matrix.
  
  Parameters:
  
  pdot - the pairwise dot product matrix.
  
  Returns:
  
  the kernel matrix.