03-20-2014
Quote:
Originally Posted by
Corona688
I don't see anything in your input or output that looks remotely like a median. I don't understand.
By definition, if there are an odd number of elements in a list, the median is the middle element in the (sorted) list. (So for dog, with the values in the 3rd field being 0, 3, and 4; 3 is the median.) If there are an even number of elements in a list, the median is the average of the middle two elements of the list. (So for cat, with the values in the 3rd field being 2 and 6, 4 is the median.)
This User Gave Thanks to Don Cragun For This Post:
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LEARN ABOUT DEBIAN
pgasetrealinitpercent
PGASetRealInitPercent(2) PGAPack PGASetRealInitPercent(2)
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);
05/01/95 PGASetRealInitPercent(2)