Any good methods for generating pseudo random integer?
Quote:
>Not too sure about this, but I've read about various "bifurcation series",
such
>as that generated by Robert May's formula pn = r * n * ( 1 - n), where n is
a
>population, pn the new population and r the growth rate. To quote
Fractint's
>help system, "At growth rates less than 200%, this model is stable: for any
>starting value, after several generations the population settles down to a
>stable level. But for rates over 200%, the equation's curve splits or
>"bifurcates" into two discrete solutions, then four, and soon becomes
chaotic.".
> So why not use this with a high growth rate, and use the "chaotic" numbers
as
>random ones? There must be a catch somewhere, though, else some1 would've
>thought about this earlier. Inputs appreciated.
> -Jim
Chaotic and Random are 2 different animals.
A chaotic sequence will appear near periodic over the short haul and only
stray from prediction over the long haul (exponential divergence).
Thus a pseudo-random# generator based on this will be very predictable
over a small data set.
Bill Butler
--