gov.sandia.cognition.learning.algorithm.regression

Class ParameterDifferentiableCostMinimizer.ParameterCostEvaluatorDerivativeBased

java.lang.Object

gov.sandia.cognition.util.AbstractCloneableSerializable

gov.sandia.cognition.learning.algorithm.regression.ParameterDifferentiableCostMinimizer.ParameterCostEvaluatorDerivativeBased

All Implemented Interfaces:

Evaluator<Vector,java.lang.Double>, DifferentiableEvaluator<Vector,java.lang.Double,Vector>, CloneableSerializable, java.io.Serializable, java.lang.Cloneable

Enclosing class:

ParameterDifferentiableCostMinimizer

public static class ParameterDifferentiableCostMinimizer.ParameterCostEvaluatorDerivativeBased
extends AbstractCloneableSerializable
implements DifferentiableEvaluator<Vector,java.lang.Double,Vector>

Function that maps the parameters of an object to its inputs, so that minimization algorithms can tune the parameters of an object against a cost function. Uses algebraic derivatives.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ParameterCostEvaluatorDerivativeBased(GradientDescendable internalFunction, DifferentiableCostFunction costFunction) Creates a new instance of ParameterCostEvaluatorDerivativeBased

Method Summary

Modifier and Type	Method and Description
ParameterDifferentiableCostMinimizer.ParameterCostEvaluatorDerivativeBased	clone() This makes public the clone method on the Object class and removes the exception that it throws.
Vector	differentiate(Vector input) Differentiates the output with respect to the input
java.lang.Double	evaluate(Vector input) Evaluates the function on the given input and returns the output.

Methods inherited from class java.lang.Object

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

Constructor Detail

ParameterCostEvaluatorDerivativeBased

public ParameterCostEvaluatorDerivativeBased(GradientDescendable internalFunction,
                                             DifferentiableCostFunction costFunction)

Creates a new instance of ParameterCostEvaluatorDerivativeBased

Parameters:

internalFunction - Object that we're tweaking the parameters of.

costFunction - Cost function against which to evaluate the cost of the object.

Method Detail

differentiate

public Vector differentiate(Vector input)

Description copied from interface: DifferentiableEvaluator

Differentiates the output with respect to the input

Specified by:

differentiate in interface DifferentiableEvaluator<Vector,java.lang.Double,Vector>

Parameters:

input - Input about which to compute the derivative

Returns:

Derivative of the output with respect to the given input

evaluate

public java.lang.Double evaluate(Vector input)

Description copied from interface: Evaluator

Evaluates the function on the given input and returns the output.

Specified by:

evaluate in interface Evaluator<Vector,java.lang.Double>

Parameters:

input - The input to evaluate.

Returns:

The output produced by evaluating the input.

clone

public ParameterDifferentiableCostMinimizer.ParameterCostEvaluatorDerivativeBased clone()

Description copied from class: AbstractCloneableSerializable

This makes public the clone method on the Object class and removes the exception that it throws. Its default behavior is to automatically create a clone of the exact type of object that the clone is called on and to copy all primitives but to keep all references, which means it is a shallow copy. Extensions of this class may want to override this method (but call super.clone() to implement a "smart copy". That is, to target the most common use case for creating a copy of the object. Because of the default behavior being a shallow copy, extending classes only need to handle fields that need to have a deeper copy (or those that need to be reset). Some of the methods in ObjectUtil may be helpful in implementing a custom clone method. Note: The contract of this method is that you must use super.clone() as the basis for your implementation.

Specified by:

clone in interface CloneableSerializable

Overrides:

clone in class AbstractCloneableSerializable

Returns:

A clone of this object.