ridgerat-tech.us - RidgeRat Obscure Technology Site

Description: Diverse notes on obscure and maybe useful technologies

control (16) mathematics (7) estimation (2) numerical analysis (1) digital filters (1)

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This site provides unpublished technical material , experimental or tutorial, that could be very useful to the right people willing to search hard enough to find it. The covered topics are expected to be intolerably obscure to everbody else. Enjoy.

Material on this site is in the process of being reconfigured for release under the Creative Commons License. That means, if you find material on this site, and give appropriate credit , you can then do anything you want with it short of violating the copyright and claiming exclusive rights. You want to copy parts of it in your Web site? You can do that. You want to use part of it in your book? You can do that too. You want to pay a fortune for this? Well sure, donations are always welcome, but that is not

Generating Randomized Latin Squares. What is a random Latin Square anyway? A latin square is an an NxN square layout of cells, each cell containing one of N distinct symbols so that each symbol appears exactly once in each column and exactly once in each row. The are MANY ways to do it, but far more ways to fail. A generator method is called random if any Latin Square has an equal probability of being produced; otherwise, the generator is called biased . But there are lots of questions: