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Re: Compare two methods of random permutations

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On 5/15/2013 11:04 AM, James Dow Allen wrote:
> On May 15, 9:11 pm, Patricia Shanahan <p...@acm.org> wrote:
>> The % method does work correctly if m is a factor of n.
>
> Duh. Yeah.  Note that the code snippet I posted assures, via
>           do a = rand();
>          while (a >= 1916006400);
> that the requirements are met throughout.
>
>> java.util.Random contains code to correct for this effect ...
>
> So do my libraries.
> I don't think this qualifies as "rocket science."

Ah, I see. You get a number that is uniformly distributed over the range
from 0 to 1916006400-1. 1916006400 is an integer multiple of 12!, so the
"m is a factor of n" condition is true for each remainder operation.

Patricia

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Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-08 23:35 +0200
  Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-11 21:31 -0700
    Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-13 08:07 +0200
      Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-13 02:34 -0700
  Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-13 08:01 +0200
  Re: Compare two methods of random permutations bob <bob@coolfone.comze.com> - 2013-05-13 08:26 -0700
    Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-13 11:42 -0700
      Re: Compare two methods of random permutations bob <bob@coolfone.comze.com> - 2013-05-16 13:46 -0700
    Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-13 21:09 +0200
      Re: Compare two methods of random permutations bob <bob@coolfone.comze.com> - 2013-05-13 12:57 -0700
        Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-13 22:59 +0200
          Re: Compare two methods of random permutations bob <bob@coolfone.comze.com> - 2013-05-13 15:28 -0700
            Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-14 10:54 +0200
              Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-14 05:32 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-14 22:46 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-14 14:19 -0700
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-14 15:06 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-15 10:16 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-15 03:54 -0700
                Re: Compare two methods of random permutations Patricia Shanahan <pats@acm.org> - 2013-05-15 07:11 -0700
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-15 11:04 -0700
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-15 11:06 -0700
                Re: Compare two methods of random permutations Patricia Shanahan <pats@acm.org> - 2013-05-15 12:55 -0700
                Re: Compare two methods of random permutations "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-05-16 06:10 +0100
                Re: Compare two methods of random permutations pacman@kosh.dhis.org (Alan Curry) - 2013-05-16 06:57 +0000
                Re: Compare two methods of random permutations "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-05-16 09:26 +0100
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-16 01:35 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-17 14:11 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-17 08:13 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 11:06 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-19 03:14 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 13:26 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-19 04:59 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 14:13 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-19 05:52 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 15:06 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-19 06:50 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 16:14 +0200
                Re: Compare two methods of random permutations James Dow Allen <jdallen2000@yahoo.com> - 2013-05-19 08:11 -0700
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 17:15 +0200
                Re: Compare two methods of random permutations Mok-Kong Shen <mok-kong.shen@t-online.de> - 2013-05-19 17:24 +0200

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