.TH PGAChange 8 "05/01/95" " " "PGAPack"
.SH NAME
PGAChange \- Repeatedly apply mutation to a string (with an increasing
mutation rate) until one or more mutations have occurred.  
.SH DESCRIPTION
This routine is
usually used with PGADuplicate to modify a duplicate string.  It is not
intended to replace PGAMutation
.SH INPUT PARAMETERS
.PD 0
.TP
ctx
- context variable
.PD 0
.TP
p
- string index
.PD 0
.TP
pop
- symbolic constant of the population containing string p
.PD 1
.SH OUTPUT PARAMETERS
.PD 0
.TP
none

.PD 1
.SH SYNOPSIS
.nf
#include "pgapack.h"
void  PGAChange(ctx, p, pop)
PGAContext *ctx
int p
int pop
.fi
.SH LOCATION
duplcate.c
.SH EXAMPLE
.nf
Example:
Change any string in PGA_NEWPOP that is an exact copy of a string
in PGA_OLDPOP.  To be complete, we should check the population again
if any changes are made; for simplicity, we don't.

PGAContext *ctx;
int b, n;
:
n  = PGAGetPopsize(ctx);
for (b=0; b<n; b++)
if (PGADuplicate(ctx, b, PGA_NEWPOP, PGA_OLDPOP, n))
PGAChange(ctx, b, PGA_NEWPOP);

.fi