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Feature
REALScience
Random Walks
Issue: 5.2 (January/February 2007)
Author: JC Cruz
Article Description: No description available.
Article Length (in bytes): 23,352
Starting Page Number: 17
RBD Number: 5209
Resource File(s):
5209.zip Updated: Monday, January 15, 2007 at 1:16 PM
Related Web Link(s):
http://en.wikipedia.org/wiki/Random_walk
Known Limitations: None
Excerpt of article text...
This article explores the concept of a random walk model and some of the basic mathematics behind it. It will also demonstrate how to use REALbasic to simulate a random walk occurring in one and two dimensions.
Introduction
In previous articles, ordinary differential equation (ODE) algorithms were used to simulate the motion of various physical systems. Furthermore, these simulated systems behave consistently and in accordance to the three Laws of Motion stated by Isaac Newton. Because of their predictable nature in the physical world, they are often referred to as deterministic systems.
However, there are certain systems whose behaviors are difficult, if not impossible, to simulate by conventional means. They display movement so complex that it appears to be totally random. Such complexity is usually caused by large numbers of near instantaneous interactions between the objects in the system. This is especially true when the dimensions of said objects approach molecular levels.
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Article copyrighted by REALbasic Developer magazine. All rights reserved.
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