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What is meant by a pseudo random number generator with a seed?I tried google.But could not get the actual idea?

What is meant by a pseudo seed?I tried google.But could not get the actual random number generator with a idea?

http://answers.yahoo.com/question/?qid=20090706124623AAUSN3U

Posted: 426 days ago by: lakshmi | 3 Answers

See Related Questions There are 3 answers to this question.

Answers:

Wikipedia is your friend.
Reference: http://en.wikipedia.org/wiki/Random_numb er_generation

426 days ago by: Rorschach

Best Answer
Here is another site that is helpful.

http://www.math.utah.edu/~pa/Random/Rand om.html

426 days ago by: oil field trash

A true random number generator would good job of looking like they're random.

One ramification of the way that pseudo random number generators are built is that if you give the algorithm a particular starting value (the 'seed') to produce a series of numbers and then you restart the algorithm, providing the same seed number, the generator will produce exactly the same series of numbers. This is not a desirable property, Most of the time it is handled by feeding the algorithm a seed number based on some portion of the system clock, resulting in a somewhat randomized starting point for the algorithm.

Another undesirable, but unavoidable, consequence of the way these algorithms are built is that certain numbers will _never_ be generated. How many numbers get skipped and how frequently the algorithm repeats itself are two measures of how good of a random number generator you have. One notoriously bad generator was produced by IBM (see http://physics.ucsc.edu/~peter/242/randu .pdf). So you do have to be careful which generator you pick if randomness is actually important for your application.

Donald Knuth is a well known authority on the subject. Here are a few comments need some sort of random, such as a radioactive decay inconvenient to work with,

But there exist some simple little as good as a true number generators. 'Pseudo' because they aren't really random; they just do a fairly process. Those tend to be somewhat occurrence on which to operate random number generator. They are called pseudo random algorithms that produce results almost from him: http://www.eng.auburn.edu/csse/classes/c omp7440/lessons/Random_Numbers.pdf

See also http://random.mat.sbg.ac.at/literature/

426 days ago by: dogsafire

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