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Re: random number seed initialisation [message #87510 is a reply to message #87509]

Mon, 10 February 2014 15:22

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Bogdanovist writes:

> Thanks David, using that keeps me safe within a single session (which I do already although not with as elegant a solution as this), but how does this ensure different seeds across different sessions/users?

The seed at object initialization is pretty damn, well..., random! The
number of seconds after January 1st, 1970 or some such thing. The chance
of a sequence repeating itself seems non-existent to me. I understand
you can purchase quantum random number generators that rely on the the
space vacuum for seed generation for only a couple hundred thousand
dollars. In other words, cheap if you need that sort of thing. ;-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		random number seed initialisation By: Matt Francis on Sun, 09 February 2014 18:21
		Re: random number seed initialisation By: David Fanning on Sun, 09 February 2014 18:37
		Re: random number seed initialisation By: Matt Francis on Mon, 10 February 2014 15:11
		Re: random number seed initialisation By: David Fanning on Mon, 10 February 2014 15:22
		Re: random number seed initialisation By: Matt Francis on Mon, 10 February 2014 15:32
		Re: random number seed initialisation By: David Fanning on Mon, 10 February 2014 15:42
		Re: random number seed initialisation By: David Fanning on Tue, 11 February 2014 07:22
		Re: random number seed initialisation By: Mats Löfdahl on Tue, 11 February 2014 01:34

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