MaplePrimes - comments on Post, Maple is too consistent!

MaplePrimes - comments on Post, Maple is too consistent! http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Tue, 09 Jun 2026 08:52:18 GMT Tue, 09 Jun 2026 08:52:18 GMT The latest comments added to the Post, Maple is too consistent! http://www.mapleprimes.com/images/mapleprimeswhite.jpg MaplePrimes - comments on Post, Maple is too consistent! http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent randomize() http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment67142 When you issue a restart command, the seed value for Maple's random number generator is reset as well. If you wish to be more "consistently random," you can issue a randomize() command to set the seed value based on your computer's clock. You can also create an init file so that a randomize(): command is always run after you restart. The latest comments added to the Post, Maple is too consistent! 67142 Mon, 09 Mar 2009 19:58:17 Z Schivnorr Schivnorr that works! http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment82057 Thank you for your reply. inserting the randomize() command after restart; does in fact, yield random strings each time it is executed. When you say "Maple's random number generator is reset as well" what is it reset to? I have not investigated how the random numbers are generated. thanks again, The latest comments added to the Post, Maple is too consistent! 82057 Tue, 10 Mar 2009 00:04:18 Z awass awass reset http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment87286 The random number generator is the Mersenne Twister.  Its state consists of a table of 625 four-byte integers.  That is what is reset.  See ?RandomTools,MersenneTwister. For more information on the Mersenne Twister you might try <http://en.wikipedia.org/wiki/Mersenne_twister>   The latest comments added to the Post, Maple is too consistent! 87286 Tue, 10 Mar 2009 00:50:47 Z Robert Israel Robert Israel Thanks. I did go to http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment87287 Thanks. I did go to WIKIpedia and there was a discussion of various algorithms. In pratice it seems best to issue the randomize() command once per session before invoking rand(). I am surprised that the default setting is not using the clock for the initial seed. Thanks for the info. The latest comments added to the Post, Maple is too consistent! 87287 Wed, 11 Mar 2009 17:58:36 Z awass awass subsecond randomization? http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment81909 Does anyone know of a way to have randomize use milliseconds instead of seconds for better initialization of the random number generator?  I am trying to run Maple in a distributed manner with Condor for some numerical analysis and monte carlo teaching demonstrations, but the current system limits me to having one unique run per second.  Thanks for the help, Mark The latest comments added to the Post, Maple is too consistent! 81909 Fri, 26 Jun 2009 01:18:59 Z Mark Goadrich Mark Goadrich Random number generator, initializing http://www.mapleprimes.com/posts/37730-Maple-Is-Too-Consistent?ref=Feed:MaplePrimes:Maple is too consistent!:Comments#comment87288 I can see it either way. There needs to be a way to predict what the random number sequence will be so that repetitive testing that relies on random numbers will yield a "predictable" sequence of random numbers. But the generator could be initialzed to some random number as you suggest, and there would be a requirement for the user to seed the generator if he wants "repeatably predictable" results from the random number generator. <address>________________________________</address> <address>~Rich~</address> <address>http://pubpages.unh.edu/~rlo9/index.html</address> The latest comments added to the Post, Maple is too consistent! 87288 Fri, 26 Jun 2009 05:24:55 Z woodwise woodwise