From: Gene <gene.ressler@gmail.com>
Subject: Re: Random number generation
Date: Thu, 30 Dec 2010 19:14:20 -0800 (PST)
Date: 2010-12-30T19:14:20-08:00 [thread overview]
Message-ID: <14a03998-6249-4c1b-8ac8-3579de23c4d9@glegroupsg2000goo.googlegroups.com> (raw)
In-Reply-To: <864o9vbkwz.fsf@gareth.avalon.lan>
I've been bitten by this before. As others have said, Reset, as imlemented in GNAT, initializes the Generator using the system time to derive a seed value. When I last looked at the GNAT library sources for Windows, it used 1-second resolution for this purpose. So if you called it twice in the same clock second, you'd get the same results from Random afterward.
This version of Reset is clearly meant to be called only once per Generator per program run to establish the streams.
next prev parent reply other threads:[~2010-12-31 3:14 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-30 10:43 Random number generation Mart van de Wege
2010-12-30 10:54 ` Thomas Løcke
2010-12-30 12:11 ` Mart van de Wege
2010-12-30 11:34 ` Niklas Holsti
2010-12-30 11:53 ` Georg Bauhaus
2010-12-30 12:25 ` Mart van de Wege
2010-12-30 15:29 ` Georg Bauhaus
2010-12-30 15:37 ` Mart van de Wege
2010-12-30 11:51 ` Brian Drummond
2010-12-30 12:16 ` Mart van de Wege
2010-12-30 13:04 ` Dmitry A. Kazakov
2010-12-30 13:22 ` Niklas Holsti
2010-12-30 13:39 ` Dmitry A. Kazakov
2010-12-30 13:30 ` Mart van de Wege
2010-12-31 3:14 ` Gene [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-07-13 12:45 tonyg
2010-07-13 12:50 ` Jacob Sparre Andersen
2010-07-13 12:58 ` Dmitry A. Kazakov
2010-07-13 13:17 ` Thomas Løcke
2010-07-13 16:07 ` Jeffrey R. Carter
2010-07-13 20:33 ` John B. Matthews
2010-07-13 23:02 ` Jeffrey R. Carter
2010-07-14 4:42 ` John B. Matthews
2010-07-15 19:01 ` tonyg
2003-09-26 7:14 random " christoph.grein
2003-09-26 7:00 Andrew
2003-09-26 7:35 ` tmoran
2003-09-26 17:58 ` Andrew
2003-09-26 19:25 ` Andrew
2003-09-26 19:35 ` chris
2003-09-26 21:44 ` tmoran
2003-09-27 1:40 ` Robert I. Eachus
2003-09-27 4:48 ` Andrew
1997-12-19 0:00 Mok-kong Shen
1998-01-02 0:00 ` Mok-kong Shen
1998-01-02 0:00 ` Robert Dewar
1996-10-13 0:00 Random Number Generation parker
1996-10-13 0:00 ` Robert Dewar
1996-10-14 0:00 ` Robert A Duff
1996-10-10 0:00 Dr J Parker
1996-10-10 0:00 Dr J Parker
1996-10-12 0:00 ` Geert Bosch
1996-10-12 0:00 ` Keith Thompson
1996-10-02 0:00 Dr J Parker
1996-10-03 0:00 ` Mats Weber
1996-10-07 0:00 ` Geert Bosch
1996-09-23 0:00 Nigel J. Tracey
1996-09-23 0:00 ` Tucker Taft
1996-10-02 0:00 ` Robert I. Eachus
1996-10-02 0:00 ` Nigel J. Tracey
1996-10-03 0:00 ` Nigel J. Tracey
1996-09-25 0:00 ` James_Rogers
1996-09-26 0:00 ` Dale Stanbrough
1996-10-01 0:00 ` Robert I. Eachus
1996-09-30 0:00 ` Dr J Parker
1996-10-01 0:00 ` Tucker Taft
1996-10-01 0:00 ` Keith Thompson
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