Function PGAFitnessLinearNormal

Function Documentation

static void PGAFitnessLinearNormal(PGAContext *ctx, int popindex)

Calculates fitness using a ranking method and linear ordering.

Description

The fitness function is of the form \(u(x) = K - (\text{rank} \cdot \sigma)\) with the constant \(K\) equal to the mean of the evaluation functions, and the decrement \(\sigma\) equal to the standard deviation of the same as defined by Davis [Dav91], p.33.

Parameters:

  • ctx – context variable

  • popindex – population index to calculate fitness for

Returns:

Calculates the fitness for each string in the population via side effect