• Absolute Error with Selection Range
• Absolute/Hits
• MSE (mean squared error)
• RMSE (root mean squared error)
• MAE (mean absolute error)
• RSE (relative squared error)
• RRSE (root relative squared error)
• RAE (relative absolute error)

Fitness functions based on the relative error:

• Relative Error with Selection Range
• Relative/Hits
• rMSE (relative MSE)
• rRMSE (relative RMSE)
• rMAE (relative MAE)
• rRSE (relative RSE)
• rRRSE (relative RRSE)
• rRAE (relative RAE)

Fitness functions based on correlation coefficients:

• R-square
• Correlation Coefficient

Fitness functions with parsimony pressure:

• And all the above with parsimony pressure

And user defined fitness functions:

• Custom Fitness Function