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.
- 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);