Objective : 
Find a function of one independent 

variable and one dependent 

variable,in symbolic form that fits 

a given sample of 20 (x_{i}, y_{i}) 

data points, where the target 

functions is the quartic polynomial 

X^{4} + X^{3} + X^{2} + X 
Terminal Operands: 
X (the independent variable) 
Terminal Operators 
The binary operators +, *, 

and, the unary operators 

Sin, Cos, Exp and Log 
Fitness cases 
The given sample of 20 data points 

in the interval [1, +1] 
Raw Fitness 
The sum, taken over the 20 fitness 

cases, of the error 
Standardised Fitness 
Same as raw fitness 
Hits 
The number of fitness cases for 

which the error is less than 0.01 
Wrapper 
Standard productions to generate 

C functions 
Parameters 
M = 500, G = 51 