roulette-wheel-selection

Roulette Selection in Genetic Algorithms

Can anyone provide some pseudo code for a roulette selection function? How would I implement this: I don't really understand how to read this math notation. I never took any probability or statistics. ...

Roulette wheel selection algorithm

Can anyone provide some pseudo code for a roulette selection function? How would I implement this: I don't really understand how to read this math notation.I want General algorithm to this. ...

Roulette-wheel selection in Genetic algorithm. Population needs to be sorted first?

Hi all. In a genetic algorithm, when selecting members for crossover using roulette-wheel selection method, does the population first need to be sorted by fitness rank? The possibilities seem to be: sort population first by ascending fitness sort population by descending fitness don't sort population & let the roulette ball fall wher...

Efficient Implementation of Fitness-Proportionate "Roulette" Selection

I am currently writing a keyboard layout optimization algorithm in C (such as the one designed by Peter Klausler) and I want to implement a fitness-proportionate selection as described here (PDF Link): With roulette selection you select members of the population based on a roullete wheel model. Make a pie chart, where the ar...

Roulette Wheel selection with a SQL query.

I am implementing a roulette wheel selection, and I would like to keep as much code as possible in SQL. My attempt has yielded the query below. $1 is a random variable of the same range as weight I send to the SQL code (it was not clear how to make random() be called only once). Weight is the size of the row's slot on the wheel. rand...

GA written in Java

I am attempting to write a Genetic Algorithm based on techniques I had picked up from the book "AI Techniques for Game Programmers" that uses a binary encoding and fitness proportionate selection (also known as roulette wheel selection) on the genes of the population that are randomly generated within the program in a two-dimensional arr...

Architecture of chatroulette

Could somebody explain to me the architecture behind chatroulette? I was thinking about a similar project that would only implement Audio support (for starters). Is the best way to set this up a flash server? If so, how should I go about getting into flash, will I need flex 4? I have some beginner experience with c++, c# and java but I h...

Roulette selection function for a genetic algorithm

So I've written a roulette selection function for my genetic algorithm which follows: public String tournament(float fitness, Chromosome pop[], int selection) { // roulette if (selection == 1) { Random random = new Random(); float slice = random.nextFloat() * fitness; float curFitness = 0.0f; ...