PGASetRealInitPercent

Langue: en

Version: 266055 (debian - 07/07/09)

Section: 2 (Appels système)

NAME

PGASetRealInitPercent - sets the upper and lower bounds for randomly initializing real-valued genes.

DESCRIPTION

For each gene these bounds define an interval from which the initial allele value is selected uniformly randomly. With this routine the user specifies a median value and a percent offset for each allele.

INPUT PARAMETERS

ctx
- context variable
median
- an array containing the mean value of the interval
percent
- an array containing the percent offset to add and subtract to the median to define the interval

OUTPUT PARAMETERS

none

SYNOPSIS

 #include "pgapack.h"
 void  PGASetRealInitPercent(ctx, median, percent)
 PGAContext *ctx
 double *median
 double *percent
 

LOCATION

real.c

EXAMPLE

 Set the initialization routines to select a value for each real-valued
 gene i uniformly randomly from the interval [i-v,i+v], where $v = i/2$.
 Assumes all strings are the same length.
 
 PGAContext *ctx;
 double *median, *percent;
 int i, stringlen;
 :
 stringlen = PGAGetStringLength(ctx);
 median  = (double *) malloc(stringlen*sizeof(double));
 percent = (double *) malloc(stringlen*sizeof(double));
 for(i=0;i<stringlen;i++) {
 median[i]  = (double) i;
 percent[i] = 0.5;
 }
 PGASetRealInitPercent(ctx, median, percent);