PGAEncodeRealAsGrayCode(1) PGAPack PGAEncodeRealAsGrayCode(1)NAME
PGAEncodeRealAsGrayCode - encodes a real value as a binary reflected Gray code sequence
INPUT PARAMETERS
ctx - context variable
p - string index
pop - symbolic constant of the population the string is in
start - starting bit position in p to encode val in
end - ending bit position in p to encode val in
low - lower bound of the interval the val is defined on
high - lower bound of the interval the val is defined on
val - the real number to be represented as a binary string
OUTPUT PARAMETERS
side -effect.
SYNOPSIS
#include "pgapack.h"
void PGAEncodeRealAsGrayCode(ctx, p, pop, start, end, low, high, val)
PGAContext *ctx
int p
int pop
int start
int end
double low
double high
double val
LOCATION
evaluate.c
EXAMPLE
Encode 3.14 from the interval [0,10] in 30 bits in bit positions
0--29 in string p in population PGA_NEWPOP as a binary reflected Gray
code sequence.
PGAContext *ctx;
int p;
:
PGAEncodeRealAsGrayCode(ctx, p, PGA_NEWPOP, 0, 29, 0.0, 10.0, 3.14);
05/01/95 PGAEncodeRealAsGrayCode(1)
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PGADuplicate(8) PGAPack PGADuplicate(8)NAME
PGADuplicate - determines if a specified string is a duplicate of one already in an existing population
INPUT PARAMETERS
ctx - context variable
p - string index
pop1 - symbolic constant of the population containing string p
pop2 - symbolic constant of the (possibly partial) population containing strings to compare string p against
n - the number of strings in pop2 to compare string p against
n -1)
OUTPUT PARAMETERS
none
SYNOPSIS
#include "pgapack.h"
int PGADuplicate(ctx, p, pop1, pop2, n)
PGAContext *ctx
int p
int pop1
int pop2
int n
LOCATION
duplcate.c
EXAMPLE
0,...,n-1 in population pop2. Otherwise returns PGA_FALSE
Example:
Change any string in PGA_NEWPOP that is an exact copy of a string
in PGA_OLDPOP.
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);
Check if the best string in population PGA_OLDPOP is a duplicate of any
of the strings in the first half of population PGA_NEWPOP.
PGAContext *ctx;
int b, n;
:
b = PGAGetBestIndex(ctx, PGA_OLDPOP);
n = PGAGetPopsize(ctx) / 2;
if (PGADuplicate(ctx, b, PGA_OLDPOP, PGA_NEWPOP, n))
printf("A duplicate!0);
05/01/95 PGADuplicate(8)
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