LISTSERV mailing list manager LISTSERV 16.0

Help for ECJ-INTEREST-L Archives


ECJ-INTEREST-L Archives

ECJ-INTEREST-L Archives


ECJ-INTEREST-L@LISTSERV.GMU.EDU


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

ECJ-INTEREST-L Home

ECJ-INTEREST-L Home

ECJ-INTEREST-L  August 2011

ECJ-INTEREST-L August 2011

Subject:

Re: Sample code for fitness methods?

From:

Roger Worden <[log in to unmask]>

Reply-To:

ECJ Evolutionary Computation Toolkit <[log in to unmask]>

Date:

Thu, 11 Aug 2011 10:09:05 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (41 lines)

Really what I want to do is output some of my variables on the way to calculating fitness, but primarily for the best individual. I'm not using multiple objectives, though I may in the future. To calculate the fitness, I calculate several sub-fitnesses and weight them myself for now. One of them is fairly complex (a dollar cost), and I'd like to output that in addition to the final fitness. I was thinking I could output that only for the final best individual, so it would make sense to do it in finalStatistics, but now I see I would have to replicate my algorithm in there rather than in the fitness object where it belongs, so I guess it's better to just output each sub-fitness variable along the way.

The only reason I was trying to mess with fitness in finalStatistics is that the compiler was telling me it was an abstract class and I was not extending all of the methods it required. Now I see that doesn't make much sense. I'll give up on finalStatistics and work within the Fitness methods.

> For each subpopulation in the population
> 		For each individual in the subpopulation
> 			Cast the individual into the type I'm using
> 			Grab genome information out of that individual and do stuff with it

I thought about this but as I mentioned, being new to OO, it's difficult to figure out what variables are available in objects and what they do. The class documentation seems to be automatically created and documents what they are but not what they mean. Code samples are helpful and greatly appreciated!

Thanks.


On Aug 1, 2011, at 2:41 PM, Sean Luke wrote:

> On Jul 29, 2011, at 12:15 PM, Roger Worden wrote:
> 
>> I'm new to Java and OO but with lots of experience in procedural languages,
>> so I'm struggling a bit with the ECJ class libraries. I have constructed an
>> evaluator and can see correct results in the genome displayed by the default
>> statistics methods. Now I need to customize the final results for reporting,
>> output to a file etc. I'd like to customize finalStatistics, and it seems I need to
>> customize printFitnessForHumans to get access to the genome so I can
>> format it.
>> 
>> Can someone post or point me to some sample code for finalStatistics that
>> shows me how to access the current individual (I'm assuming finalStatistics is
>> called once per individual), or how to access the whole state from this
>> method?
> 
> It sounds like what you're really trying to do is write out some statistics about your genome.  Fitness objects don't have anything to do with this -- instead, the genome is handled in the Individual itself.  Different representations of Individuals have different kinds of genomes.  For example, FloatVectorIndividual holds a genome consisting of an array of floats.
> 
> Additionally, finalStatistics is called only once, at the end of an evolutionary run.  It's not per-individual.  I presume you're trying to report stuff on each Individual in the population say.  In this case, you could make a finalStatistics which does this:
> 
> 	For each subpopulation in the population
> 		For each individual in the subpopulation
> 			Cast the individual into the type I'm using
> 			Grab genome information out of that individual and do stuff with it
> 
> Sean

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

September 2019
August 2019
June 2019
April 2019
March 2019
January 2019
December 2018
November 2018
October 2018
July 2018
May 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
September 2004
August 2004
July 2004
June 2004
May 2004
April 2004
March 2004

ATOM RSS1 RSS2



LISTSERV.GMU.EDU

CataList Email List Search Powered by the LISTSERV Email List Manager