NAME
PGAFitness - Maps the user’s evaluation function value to a fitness
value.
DESCRIPTION
First, the user’s evaluation function value is translated to all
positive values if any are negative. Next, this positive sequence is
translated to a maximization problem if the user’s optimization
direction was minimization. This positive sequence is then mapped to a
fitness value using linear ranking, linear normalization fitness, or
the identity (i.e., the evaluation function value). This routine is
usually used after PGAEvaluate is called.
INPUT PARAMETERS
ctx - context variable
pop - symbolic constant of the population to calculate fitness for
OUTPUT PARAMETERS
none
SYNOPSIS
#include "pgapack.h"
void PGAFitness(ctx, popindex)
PGAContext *ctx
int popindex
LOCATION
fitness.c
EXAMPLE
Example:
Calculate the fitness of all strings in population PGA_NEWPOP after
calling PGAEvaluate to calculate the strings evaluation value.
double energy(PGAContext *ctx, int p, int pop);
PGAContext *ctx;
:
PGAEvaluate(ctx, PGA_NEWPOP, energy);
PGAFitness (ctx, PGA_NEWPOP);
05/01/95 PGAFitness(1)