PGASortPop8
Creates an (internal) array of indices according to one of three criteria.
Usage
void PGASortPop(ctx,
pop)
PGAContext *ctx
int pop
Overview
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.
Input parameters
ctx
|
- context variable |
|---|---|
popindex
|
- symbolic constant of the population from which to create the srted array. |
Output parameters
- none
Location
pop.c
Examples
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);
:
Releases
Unchanged in 4 releases since Debian 5.0 (Lenny).