NAME

       PGAChange - Repeatedly apply mutation to a string (with an increasing mutation rate) until
       one or more mutations have occurred.

DESCRIPTION

       This routine is usually used with PGADuplicate to modify a duplicate string.   It  is  not
       intended to replace PGAMutation

INPUT PARAMETERS

       ctx    - context variable
       p      - string index
       pop    - symbolic constant of the population containing string p

OUTPUT PARAMETERS

       none

SYNOPSIS

       #include "pgapack.h"
       void  PGAChange(ctx, p, pop)
       PGAContext *ctx
       int p
       int pop

LOCATION

       duplcate.c

EXAMPLE

       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);

                                             05/01/95                                PGAChange(8)