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 without replacement. The function
PGASetPopReplaceType() is used to specify which strategy is used. The indices
of the sorted population members may then be accessed from the internal array
via PGAGetSortedPopIndex(). This routine is typically used during population
replacement.
- 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);
: