MajorityGA (ECJ 22 API)

java.lang.Object
- ec.Problem
- - ec.app.majority.MajorityGA

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, Serializable, Cloneable
```
public class MajorityGA
extends Problem
implements SimpleProblemForm
```
MajorityGA.java Implements a GA-style vector rule for the one-dimensional Majority-Ones cellular automaton problem. This code is in the spirit of Das, Crutchfield, Mitchel, and Hanson, "Evolving Globally Synchronized Cellular Automata", http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.55.7754&rep=rep1&type=pdf The primary difference is in the trials mechanism, in which we're using 25/25/50 rather than 50/50/0. If you run java ec.app.majority.MajorityGA, it'll test using the ABK rule instead (0.8342 using 10000 tests, 0.82528 if you use 100000 tests, 0.823961 if you use 1000000 tests)

See Also:
Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`(package private) CA`	`ca`
`static int`	`CA_WIDTH`
`(package private) double`	`density`
`private Object[]`	`lock`
`(package private) int`	`lockCount`
`(package private) int[]`	`majorities`
`(package private) static int`	`MAJORITY_ONE`
`(package private) static int`	`MAJORITY_ZERO`
`static int`	`NEIGHBORHOOD`
`static int`	`NUM_TESTS`
`static int`	`NUM_TRIALS`
`(package private) static int`	`RANDOM`
`static int`	`STEPS`
`(package private) int[][]`	`trials`

Fields inherited from class ec.Problem
P_PROBLEM

Constructor Summary

Constructors
Constructor and Description

MajorityGA()

Constructors
Constructor and Description
`MajorityGA()`

Method Summary

Methods
Modifier and Type	Method and Description
`static boolean`	`all(int[] vals, int val)`
`void`	`describe(EvolutionState state, Individual ind, int subpopulation, int threadnum, int log)` Part of SimpleProblemForm.
`void`	`evaluate(EvolutionState state, Individual ind, int subpopulation, int threadnum)` Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.
`void`	`finishEvaluating(EvolutionState state, int threadnum)` Will be called by the Evaluator after prepareToEvaluate(...) is called and then a series of individuals are evaluated.
`void`	`generateTrials(EvolutionState state, int thread)`
`static void`	`main(String[] args)`
`(package private) boolean`	`makeTrial(EvolutionState state, int thread, int[] trial, int trialType)`
`void`	`prepareToEvaluate(EvolutionState state, int threadnum)` May be called by the Evaluator prior to a series of individuals to evaluate, and then ended with a finishEvaluating(...).
`void`	`setup(EvolutionState state, Parameter base)` Sets up the object by reading it from the parameters stored in state, built off of the parameter base base.

Methods inherited from class ec.Problem
canEvaluate, clone, closeContacts, defaultBase, describe, initializeContacts, reinitializeContacts

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ca
```
CA ca
```
  - NUM_TRIALS
```
public static final int NUM_TRIALS
```
    See Also:
    Constant Field Values
  - CA_WIDTH
```
public static final int CA_WIDTH
```
    See Also:
    Constant Field Values
  - NEIGHBORHOOD
```
public static final int NEIGHBORHOOD
```
    See Also:
    Constant Field Values
  - STEPS
```
public static final int STEPS
```
    See Also:
    Constant Field Values
  - trials
```
int[][] trials
```
  - majorities
```
int[] majorities
```
  - MAJORITY_ZERO
```
static final int MAJORITY_ZERO
```
    See Also:
    Constant Field Values
  - MAJORITY_ONE
```
static final int MAJORITY_ONE
```
    See Also:
    Constant Field Values
  - RANDOM
```
static final int RANDOM
```
    See Also:
    Constant Field Values
  - lockCount
```
int lockCount
```
  - lock
```
private Object[] lock
```
  - NUM_TESTS
```
public static final int NUM_TESTS
```
    See Also:
    Constant Field Values
  - density
```
double density
```
- Constructor Detail
  - MajorityGA
```
public MajorityGA()
```
- Method Detail
  - makeTrial
```
boolean makeTrial(EvolutionState state,
                int thread,
                int[] trial,
                int trialType)
```
  - generateTrials
```
public void generateTrials(EvolutionState state,
                  int thread)
```
  - setup
```
public void setup(EvolutionState state,
         Parameter base)
```
    Description copied from interface: Prototype
    
    Sets up the object by reading it from the parameters stored in state, built off of the parameter base base. If an ancestor implements this method, be sure to call super.setup(state,base); before you do anything else.
    For prototypes, setup(...) is typically called once for the prototype instance; cloned instances do not receive the setup(...) call. setup(...) may be called more than once; the only guarantee is that it will get called at least once on an instance or some "parent" object from which it was ultimately cloned.
    
    Specified by:
    
    setup in interface Prototype
    
    Specified by:
    
    setup in interface Setup
    
    Overrides:
    
    setup in class Problem
  - prepareToEvaluate
```
public void prepareToEvaluate(EvolutionState state,
                     int threadnum)
```
    Description copied from class: Problem
    
    May be called by the Evaluator prior to a series of individuals to evaluate, and then ended with a finishEvaluating(...). If this is the case then the Problem is free to delay modifying the individuals or their fitnesses until at finishEvaluating(...). If no prepareToEvaluate(...) is called prior to evaluation, the Problem must complete its modification of the individuals and their fitnesses as they are evaluated as stipulated in the relevant evaluate(...) documentation for SimpleProblemForm or GroupedProblemForm. The default method does nothing. Note that prepareToEvaluate() can be called *multiple times* prior to finishEvaluating() being called -- in this case, the subsequent calls may be ignored.
    
    Overrides:
    
    prepareToEvaluate in class Problem
  - finishEvaluating
```
public void finishEvaluating(EvolutionState state,
                    int threadnum)
```
    Description copied from class: Problem
    
    Will be called by the Evaluator after prepareToEvaluate(...) is called and then a series of individuals are evaluated. However individuals may be evaluated without prepareToEvaluate or finishEvaluating being called at all. See the documentation for prepareToEvaluate for more information. The default method does nothing.
    
    Overrides:
    
    finishEvaluating in class Problem
  - all
```
public static boolean all(int[] vals,
          int val)
```
  - evaluate
```
public void evaluate(EvolutionState state,
            Individual ind,
            int subpopulation,
            int threadnum)
```
    Description copied from interface: SimpleProblemForm
    
    Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.
    
    Specified by:
    
    evaluate in interface SimpleProblemForm
  - describe
```
public void describe(EvolutionState state,
            Individual ind,
            int subpopulation,
            int threadnum,
            int log)
```
    Description copied from class: Problem
    
    Part of SimpleProblemForm. Included here so you don't have to write the default version, which usually does nothing.
    
    Specified by:
    
    describe in interface SimpleProblemForm
    
    Overrides:
    
    describe in class Problem
  - main
```
public static void main(String[] args)
```

Class MajorityGA

Field Summary

Fields inherited from class ec.Problem

Constructor Summary

Method Summary

Methods inherited from class ec.Problem

Methods inherited from class java.lang.Object

Field Detail

ca

NUM_TRIALS

CA_WIDTH

NEIGHBORHOOD

STEPS

trials

majorities

MAJORITY_ZERO

MAJORITY_ONE

RANDOM

lockCount

lock

NUM_TESTS

density

Constructor Detail

MajorityGA

Method Detail

makeTrial

generateTrials

setup

prepareToEvaluate

finishEvaluating

all

evaluate

describe

main