The APS Environment

Choosing the Fitness Function
 
Depending on the Problem Category, you have access to different built-in fitness functions. Additionally, for all kinds of problems you can also design your own fitness function.

So, both for Function Finding and Time Series Prediction you can select one of the 11 built-in fitness functions: 

For Classification APS 3.0 offers 10 different built-in fitness functions:

The kind of fitness function you choose will depend most probably on the statistical function you are most familiar with. And although there is nothing wrong with this for all of them can accomplish an efficient evolution, you might want to try different fitness functions for they travel the fitness landscape differently: some of them very straightforwardly in their pursuits while others choose less obvious paths.

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