com.rubecula.darwin.domain.fitness
Class FitnessFunction_

java.lang.Object
  com.rubecula.darwin.foundation.Function_
      com.rubecula.darwin.domain.fitness.FitnessFunction_

All Implemented Interfaces:

FitnessFunction, Function, com.rubecula.jexpression.EvalExpression, com.rubecula.jexpression.EvalExpressionMutable, com.rubecula.jexpression.Valuable, net.sf.tostring0.Identifiable

Direct Known Subclasses:

FitnessFunction_Normal, FitnessFunction_PseudoPoisson, FitnessFunction_ScaledNormal

public abstract class FitnessFunction_
extends Function_
implements FitnessFunction

Author:

Robin Hillyard

Field Summary

Fields inherited from class com.rubecula.darwin.foundation.Function_

evaluator, LOG

Fields inherited from interface com.rubecula.darwin.domain.helper.FitnessFunction

PREFIX_VAR_RPN, VAR_SHAPE_FACTOR, VAR_TARGET, VAR_VALUE

Constructor Summary

protected	FitnessFunction_() TEST
protected	FitnessFunction_(com.rubecula.jexpression.Evaluator evaluator)

Method Summary

double

getFitness(double value, double target, double factor) Get the fitness based on the value (usually from one of the traits of a phenotype), the target (usually a value from an eco factor in the environment), and the shape factor (usually determined by the application).

Methods inherited from class com.rubecula.darwin.foundation.Function_

addListener, addSymbol, equals, evaluate, getErrorInfo, getEvaluator, getExpression, getExpressionMap, getExpressionTerms, getValue, hashCode, isDifferent, isMutable, normalDistributionDensityFunction, normalDistributionDensityFunctionScaled, onFunctionChange, removeVariable, reset, setEvaluator, setExpression, setExpression, standardFunction, standardFunctionTokens

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.tostring0.Identifiable

getIdentifier

Constructor Detail

FitnessFunction_

protected FitnessFunction_()

TEST

FitnessFunction_

protected FitnessFunction_(com.rubecula.jexpression.Evaluator evaluator)

Parameters:

evaluator - the evaluator (expression engine) used to evaluate the expression.

Method Detail

getFitness

public double getFitness(double value,
                         double target,
                         double factor)
                  throws FitnessException

Get the fitness based on the value (usually from one of the traits of a phenotype), the target (usually a value from an eco factor in the environment), and the shape factor (usually determined by the application).

Specified by:

getFitness in interface FitnessFunction

Parameters:

value - the variate value.

target - usually the mean value of a distribution, if such a concept is meaningful.

factor - usually the standard deviation of a distribution, if such a concept is meaningful.

Returns:

the value of the expression evaluated by the Evaluator or the value returned from Function_.evaluate(Object...) with parameters: VAR_VALUE, value, VAR_TARGET, target, VAR_SHAPE_FACTOR, factor.

Throws:

FitnessException

See Also:

FitnessFunction.getFitness(double, double, double)