|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectec.Fitness
ec.multiobjective.MultiObjectiveFitness
public class MultiObjectiveFitness
MultiObjectiveFitness is a subclass of Fitness which implements basic multi-objective mechanisms suitable for being used with a variety of multi-objective selection mechanisms, including ones using pareto-optimality.
The object contains two items: an array of floating point values representing the various multiple fitnesses (ranging from 0.0 (worst) to 1.0 inclusive), and a flag (maximize) indicating whether higher is considered better. By default, isIdealFitness() always returns false; you'll probably want to override that [if appropriate to your problem].
Parameters
base.num-objectives (else)multi.num-objectives int >= 1 |
(the number of fitnesses in the multifitness array) |
base.maximize bool = true (default) or false |
(are higher values considered "better"?) |
Default Base
multi.fitness
Field Summary | |
---|---|
static java.lang.String |
FITNESS_POSTAMBLE
|
boolean |
maximize
|
static java.lang.String |
MULTI_FITNESS_POSTAMBLE
|
float[] |
multifitness
The various fitnesses. |
static java.lang.String |
P_MAXIMIZE
Is higher better? |
static java.lang.String |
P_NUMFITNESSES
parameter for size of multifitness |
Fields inherited from class ec.Fitness |
---|
FITNESS_PREAMBLE, P_FITNESS |
Constructor Summary | |
---|---|
MultiObjectiveFitness()
|
Method Summary | |
---|---|
boolean |
betterThan(Fitness _fitness)
Returns true if I'm better than _fitness. |
java.lang.Object |
clone()
Creates a new individual cloned from a prototype, and suitable to begin use in its own evolutionary context. |
Parameter |
defaultBase()
Returns the default base for this prototype. |
boolean |
equivalentTo(Fitness _fitness)
Returns true if I'm equivalent in fitness (neither better nor worse) to _fitness. |
float |
fitness()
Returns the Max() of multifitnesses, which adheres to Fitness.java's protocol for this method. |
java.lang.String |
fitnessToString()
Print to a string the fitness in a fashion intended to be parsed in again via readFitness(...). |
java.lang.String |
fitnessToStringForHumans()
Print to a string the fitness in a fashion readable by humans, and not intended to be parsed in again. |
boolean |
isIdealFitness()
Returns true if this fitness is the "ideal" fitness. |
void |
readFitness(EvolutionState state,
java.io.DataInput dataInput)
Reads the binary form of an individual from a DataInput. |
void |
readFitness(EvolutionState state,
java.io.LineNumberReader reader)
Reads in the fitness from a form outputted by fitnessToString() and thus printFitnessForHumans(...). |
void |
setup(EvolutionState state,
Parameter base)
Sets up. |
void |
writeFitness(EvolutionState state,
java.io.DataOutput dataOutput)
Writes the binary form of an individual out to a DataOutput. |
Methods inherited from class ec.Fitness |
---|
printFitness, printFitness, printFitnessForHumans |
Methods inherited from class java.lang.Object |
---|
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final java.lang.String MULTI_FITNESS_POSTAMBLE
public static final java.lang.String FITNESS_POSTAMBLE
public static final java.lang.String P_NUMFITNESSES
public static final java.lang.String P_MAXIMIZE
public float[] multifitness
public boolean maximize
Constructor Detail |
---|
public MultiObjectiveFitness()
Method Detail |
---|
public Parameter defaultBase()
Prototype
public java.lang.Object clone()
Prototype
Typically this should be a full "deep" clone. However, you may share certain elements with other objects rather than clone hem, depending on the situation:
Implementations.
public Object clone()
{
try
{
return super.clone();
}
catch ((CloneNotSupportedException e)
{ throw new InternalError(); } // never happens
}
public Object clone()
{
try
{
MyObject myobj = (MyObject) (super.clone());
// put your deep-cloning code here...
}
catch ((CloneNotSupportedException e)
{ throw new InternalError(); } // never happens
return myobj;
}
public Object clone()
{
MyObject myobj = (MyObject) (super.clone());
// put your deep-cloning code here...
return myobj;
}
clone
in interface Prototype
clone
in class Fitness
public float fitness()
fitness
in class Fitness
public void setup(EvolutionState state, Parameter base)
setup
in interface Prototype
setup
in interface Setup
setup
in class Fitness
public boolean isIdealFitness()
isIdealFitness
in class Fitness
public boolean equivalentTo(Fitness _fitness)
equivalentTo
in class Fitness
public boolean betterThan(Fitness _fitness)
betterThan
in class Fitness
public java.lang.String fitnessToString()
Fitness
fitnessToString
in class Fitness
public java.lang.String fitnessToStringForHumans()
Fitness
fitnessToStringForHumans
in class Fitness
public void readFitness(EvolutionState state, java.io.LineNumberReader reader) throws java.io.IOException
Fitness
readFitness
in class Fitness
java.io.IOException
public void writeFitness(EvolutionState state, java.io.DataOutput dataOutput) throws java.io.IOException
Fitness
writeFitness
in class Fitness
java.io.IOException
public void readFitness(EvolutionState state, java.io.DataInput dataInput) throws java.io.IOException
Fitness
readFitness
in class Fitness
java.io.IOException
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |