PGARank (1)

This is a value between 1,...,N (the population size). The most fit string has rank 1, the least fit string has rank N.

ctx

- context variable

p

- the index of the string whose rank is desired

order

- an array containing a unique rank for each string

n

- the size of the array order

none

#include "pgapack.h"
int  PGARank(ctx, p, order, n)
PGAContext *ctx
int p
int *order
int n

fitness.c

Example:
Determine the rank of string p.

PGAContext *ctx;
int i, popsize, rank, *order;
double *fitness;

popsize = PGAGetPopsize(ctx);
order   = (int *)   malloc(sizeof(int)    * popsize);
fitness = (double *)malloc(sizeof(double) * popsize);

for(i=0;i<popsize; i++) {
fitness[i] = PGAGetFitness(ctx, p, PGA_OLDPOP);
order[i]   = i;
}

PGADblHeapSort(ctx, fitness, order, popsize);
rank = PGARank(ctx, p, order, popsize)