com.itemanalysis.psychometrics.optimization

Enum StochasticCalculateMethods

java.lang.Object

java.lang.Enum<StochasticCalculateMethods>

com.itemanalysis.psychometrics.optimization.StochasticCalculateMethods

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<StochasticCalculateMethods>

public enum StochasticCalculateMethods
extends java.lang.Enum<StochasticCalculateMethods>

This enumeratin was created to organize the selection of different methods for stochastic calculations. It was also created for use with Stochastic Meta Descent (SMDMinimizer) due to the need for Hessian Vector Products, and the inefficiency of continuing to calculate these vector products in other minimization methods like Stochastic Gradient Descent (SGDMinimizer)

Author:

Alex Kleeman (akleeman@stanford.edu)

Enum Constant Summary

Enum Constants

Enum Constant and Description
AlgorithmicDifferentiation
ExternalFiniteDifference
GradientOnly
IncorporatedFiniteDifference
NoneSpecified

Method Summary

Modifier and Type	Method and Description
boolean	calculatesHessianVectorProduct()
static StochasticCalculateMethods	parseMethod(java.lang.String method)
static StochasticCalculateMethods	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static StochasticCalculateMethods[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

NoneSpecified

public static final StochasticCalculateMethods NoneSpecified

GradientOnly

public static final StochasticCalculateMethods GradientOnly

AlgorithmicDifferentiation

public static final StochasticCalculateMethods AlgorithmicDifferentiation

IncorporatedFiniteDifference

public static final StochasticCalculateMethods IncorporatedFiniteDifference

ExternalFiniteDifference

public static final StochasticCalculateMethods ExternalFiniteDifference

Method Detail

values

public static StochasticCalculateMethods[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (StochasticCalculateMethods c : StochasticCalculateMethods.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static StochasticCalculateMethods valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

calculatesHessianVectorProduct

public boolean calculatesHessianVectorProduct()

parseMethod

public static StochasticCalculateMethods parseMethod(java.lang.String method)