org.openimaj.ml.linear.learner.loss

Class LossFunction

java.lang.Object

org.openimaj.ml.linear.learner.loss.LossFunction

Direct Known Subclasses:

MatLossFunction, MatSquareLossFunction, SquareLossFunction, SquareMissingLossFunction

public abstract class LossFunction
extends Object

With a held Y and X, return gradient and evaluations of a loss function of some parameters s.t. J(W) = F(Y,X,W)

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

Field Summary

Fields

Modifier and Type	Field and Description
protected gov.sandia.cognition.math.matrix.Matrix	bias
protected gov.sandia.cognition.math.matrix.Matrix	X
protected gov.sandia.cognition.math.matrix.Matrix	Y

Constructor Summary

Constructors

Constructor and Description
LossFunction()

Method Summary

Modifier and Type	Method and Description
abstract double	eval(gov.sandia.cognition.math.matrix.Matrix W)
abstract gov.sandia.cognition.math.matrix.Matrix	gradient(gov.sandia.cognition.math.matrix.Matrix W)
abstract boolean	isMatrixLoss()
void	setBias(gov.sandia.cognition.math.matrix.Matrix bias)
void	setX(gov.sandia.cognition.math.matrix.Matrix X)
void	setY(gov.sandia.cognition.math.matrix.Matrix Y)
boolean	test_backtrack(gov.sandia.cognition.math.matrix.Matrix W, gov.sandia.cognition.math.matrix.Matrix grad, gov.sandia.cognition.math.matrix.Matrix prox, double eta)

Methods inherited from class java.lang.Object

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

Field Detail

X

protected gov.sandia.cognition.math.matrix.Matrix X

Y

protected gov.sandia.cognition.math.matrix.Matrix Y

bias

protected gov.sandia.cognition.math.matrix.Matrix bias

Constructor Detail

LossFunction

public LossFunction()

Method Detail

setX

public void setX(gov.sandia.cognition.math.matrix.Matrix X)

setY

public void setY(gov.sandia.cognition.math.matrix.Matrix Y)

gradient

public abstract gov.sandia.cognition.math.matrix.Matrix gradient(gov.sandia.cognition.math.matrix.Matrix W)

eval

public abstract double eval(gov.sandia.cognition.math.matrix.Matrix W)

setBias

public void setBias(gov.sandia.cognition.math.matrix.Matrix bias)

isMatrixLoss

public abstract boolean isMatrixLoss()

test_backtrack

public boolean test_backtrack(gov.sandia.cognition.math.matrix.Matrix W,
                              gov.sandia.cognition.math.matrix.Matrix grad,
                              gov.sandia.cognition.math.matrix.Matrix prox,
                              double eta)