gpsys.symreg
Class SymReg

java.lang.Object
  |
  +--gpsys.symreg.SymReg

public class SymReg

extends java.lang.Object

implements GPObserver

The user interface for the symbolic regression problem. This class also contains the main() function to execute the application.

Version:

$Revision: 1.1 $, $Date: 2000/07/05 16:25:51 $

Author:

Adil Qureshi

Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.

Field Summary

(package private) java.lang.String

filePrefix The filePrefix to use when saving reports and generation states during evolution.

Constructor Summary

SymReg(java.lang.String filePrefix)
Construct the symbolic regression user interface using the specified file prefix.

Method Summary

void	diagnosticUpdate(java.lang.String s) Print the diagnostic message to the standard output.
void	exception(GPException e) Print the exception and generate a stack trace on the standard output.
void	generationUpdate(GPParameters gpParameters, int how) If the filePrefix is null, just write a report of the current generation to the standard output.
void	individualUpdate(GPParameters gpParameters, Individual i, int creationIndex) We are not interested in this update, so we just ignore it.
void	individualUpdate(GPParameters gpParameters, int individualIndex, int creationIndex) We are not interested in this update, so we just ignore it.
static void	main(java.lang.String[] argv) The main() method of the symbolic regression application.

Methods inherited from class java.lang.Object

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

Field Detail

filePrefix

java.lang.String filePrefix

The filePrefix to use when saving reports and generation states during evolution.

Constructor Detail

SymReg

public SymReg(java.lang.String filePrefix)

Construct the symbolic regression user interface using the specified file prefix.

Parameters:

filePrefix - The file prefix to bse used for saving reports and generation states.

Method Detail

generationUpdate

public void generationUpdate(GPParameters gpParameters,
                             int how)

If the filePrefix is null, just write a report of the current generation to the standard output. Otherwise, also append the report to the file "filePrefix.txt" and save the current generation to the file "filePrefix.p1.gzip".

Specified by:

generationUpdate in interface GPObserver

Parameters:

gpParameters - The GP parameters used for this run.

how - How the generation was created. Can be either CREATION, FROMSTREAM or EVOLVED.

individualUpdate

public void individualUpdate(GPParameters gpParameters,
                             Individual i,
                             int creationIndex)

We are not interested in this update, so we just ignore it.

Specified by:

individualUpdate in interface GPObserver

Parameters:

gpParameters - the GP parameters used for this run.

i - the Individual that has just been created.

creationIndex - the index of the Individual in the population.

individualUpdate

public void individualUpdate(GPParameters gpParameters,
                             int individualIndex,
                             int creationIndex)

We are not interested in this update, so we just ignore it.

Parameters:

gpParameters - the GP parameters used for this run.

individualIndex - the index of the created Individual in the population.

creationMethod - how the Individual was created. Can be either VIA_MUTATION or VIA_CROSSOVER.

diagnosticUpdate

public void diagnosticUpdate(java.lang.String s)

Print the diagnostic message to the standard output.

Specified by:

diagnosticUpdate in interface GPObserver

Parameters:

s - The diagnostic message.

exception

public void exception(GPException e)

Print the exception and generate a stack trace on the standard output.

Specified by:

exception in interface GPObserver

Parameters:

e - The exception that was genearted.

main

public static void main(java.lang.String[] argv)

The main() method of the symbolic regression application. This application may be invoked in any of the following ways.

		java SymReg <filePrefix>
		java SymReg <filePrefix> <generations>
		java SymReg <filePrefix> <RNG seed> <population> <generations>
		java SymReg <RNG seed> <population> <generations>
 

The first istructs the application to restart from the last saved session using the files with the prefix specified. The second is the same as the first, execept that the maximum number of geneartion is modified as specified. The third istructs the application to start a new run using the specifed file prefix for saves, and the specified parameters for the run. The last is the similar to the previous invokation except that nothing is saved to disk and is hence very fast.