Liza,

AFAIK, you'll have to write your own Statistics object to do this.  It's not too hard—an explanation of how to do so is found in Tutorial 3.

Personally, the first thing I often do when creating an ECJ application is to write a Statistics object that records the genomes and fitnesses of the entire population for every generation.  That creates a ton of data, but it makes it easy to ask whatever questions I want after a run completes.

Siggy

On Sun, May 21, 2017 at 11:54 AM, Norliza Abdullah <[log in to unmask]> wrote:
Hi all,


 I am implementing Regression Problem using GP. Is it possible for me to obtain the second best individual?

Thank you.

Best Wishes,

Liza



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Ph.D student in Computer Science, George Mason University
CFO and Web Director, Journal of Mason Graduate Research
http://mason.gmu.edu/~escott8/