wo new chromosomes generated using the crossover operation based on two

d chromosomes shown in Figure 8.3 plus a cutting point.

e genetic programming algorithm

milar to GA in terms of the use of chromosomes for representing

s for a system. The difference is that a GP chromosome is no

string of binary values or discrete values. Instead, a chromosome

GP is an expression involving the use of several mathematical

s on some variables.

he reverse Polish notation

one of the popular methods to encode an equation into a

ome is called the reverse Polish notation (RPN) [Hamblin, 1962].

used for a computer program for easy encoding, compiling and

g of an equation. When variables within an equation have been

values, parsing a RPN notation can easily evaluate the equation.

been used for biological/medical pattern analysis in different

ang, et al., 2003; Linden and Bhaya, 2007; Yang, et al., 2009;

i, et al., 2012].

RPN string, variables are placed before an operator. For instance,

wing equation can be expressed as a RPN string or a GP

ome, x3y*+xz*+ or x3y*xz*++,

ݔ൅3ݕ൅ݔݖ

above RPN string, the first star operator multiplies a constant 3

variable y. The first cross operator sums the variable x and the

etween the constant 3 and the variable y. The second star operator

s the variable x with the variable z. The second cross operator

3ݕ and ݔݖ. In such a string, either a variable or an operator is

oken.