PGASortPop(8) PGAPack PGASortPop(8)
NAME
PGASortPop - Creates an (internal) array of indices according to one of three criteria.
DESCRIPTION
If PGA_POPREPL_BEST is used (the default) the array is sorted from most fit to least fit. If PGA_POPREPL_RANDOM_REP is used the indices in
the array are selected randomly with replacement. If PGA_POPREPL_RANDOM_NOREP is used the indices in the array are selected randomly with-
out replacement. The function PGASetPopReplaceType() is used to specify which strategy is used. The indices of the sorted population mem-
bers may then be accessed from the internal array via PGAGetSortedPopIndex(). This routine is typically used during population replace-
ment.
INPUT PARAMETERS
ctx - context variable
popindex
- symbolic constant of the population from which to create the srted array.
OUTPUT PARAMETERS
none
SYNOPSIS
#include "pgapack.h"
void PGASortPop(ctx, pop)
PGAContext *ctx
int pop
LOCATION
pop.c
EXAMPLE
Example:
Copy the five best strings from the old population into the new
population. The rest of the new population will be created by
recombination, and is not shown.
PGAContext *ctx;
int i,j;
:
PGASetPopReplaceType(ctx,PGA_POPREPL_BEST)
:
PGASortPop(ctx, PGA_OLDPOP);
for ( i=0; i < 5; i++) {
j = PGAGetSortedPopIndex(ctx, i);
PGACopyIndividual (ctx, j, PGA_OLDPOP, i, PGA_NEWPOP);
:
05/01/95 PGASortPop(8)
