Stable Random Number Generator?

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Christopher Howard

9 Sep 2016 9 Sep '16

11:12 p.m.

Hi. What would be a good library if I want a pseudo-RNG which is stable across platforms and compiler versions? By "stable" I mean always produces the same values after being given a particular seed. I have a number of projects which involve generating some kind of pattern or graphic, where the algorithm is either fed values from a RNG, or starts with initial conditions generated by an RNG. So, I want an RNG which which produce the same results when different users on different systems enter the same seed. -- https://qlfiles.net My PGP public key ID is 0x340EA95A (pgp.mit.edu).

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Thomas DuBuisson

9 Sep 9 Sep

11:23 p.m.

My recommendation in the past, and now, continues to be this: If you want something stable then use something that implements a standard. I believe MWC generators implement a standard (up to you if you like them). The DRBG package Hash and HMAC generators implement a standard. The stream ciphers available on Hackage all implement a well specified unchanging algorithm and produce a stream of random bits from a seed (ChaCha20 from cryptonite, AES-CTR from many places, etc etc). -Thomas On Fri, Sep 9, 2016 at 8:12 PM, Christopher Howard wrote:

...

Hi. What would be a good library if I want a pseudo-RNG which is stable across platforms and compiler versions? By "stable" I mean always produces the same values after being given a particular seed. I have a number of projects which involve generating some kind of pattern or graphic, where the algorithm is either fed values from a RNG, or starts with initial conditions generated by an RNG. So, I want an RNG which which produce the same results when different users on different systems enter the same seed.

-- https://qlfiles.net My PGP public key ID is 0x340EA95A (pgp.mit.edu).

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

Stephen Tetley

10 Sep 10 Sep

4:08 a.m.

Jerzy Karczmarzcuk has often mentioned ergodic functions on this mailing list which have the stability properties you are after, and for the generation of graphics and the like their "not quite randomness" should have no dishonour. You should be able to crib the one (written in Clean) from this paper. https://karczmarczuk.users.greyc.fr/arpap/texturf.pdf On 10 September 2016 at 04:12, Christopher Howard wrote:

...

Hi. What would be a good library if I want a pseudo-RNG which is stable across platforms and compiler versions? By "stable" I mean always produces the same values after being given a particular seed. I have a number of projects which involve generating some kind of pattern or graphic, where the algorithm is either fed values from a RNG, or starts with initial conditions generated by an RNG. So, I want an RNG which which produce the same results when different users on different systems enter the same seed.

-- https://qlfiles.net My PGP public key ID is 0x340EA95A (pgp.mit.edu).

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

Ken Bateman

1:41 p.m.

I agree with the answers so far. I just want to warn you away from the default Random class instances for basic datatypes from the random package. They are not guaranteed stable across library versions. Their implementations have changed. On Sep 10, 2016 4:08 AM, "Stephen Tetley" wrote:

...

Jerzy Karczmarzcuk has often mentioned ergodic functions on this mailing list which have the stability properties you are after, and for the generation of graphics and the like their "not quite randomness" should have no dishonour.

You should be able to crib the one (written in Clean) from this paper. https://karczmarczuk.users.greyc.fr/arpap/texturf.pdf

...
Hi. What would be a good library if I want a pseudo-RNG which is stable across platforms and compiler versions? By "stable" I mean always

...
the same values after being given a particular seed. I have a number of projects which involve generating some kind of pattern or graphic, where

On 10 September 2016 at 04:12, Christopher Howard wrote: produces the

...
algorithm is either fed values from a RNG, or starts with initial conditions generated by an RNG. So, I want an RNG which which produce the same results when different users on different systems enter the same seed.

-- https://qlfiles.net My PGP public key ID is 0x340EA95A (pgp.mit.edu).

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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participants (4)

Christopher Howard
Ken Bateman
Stephen Tetley
Thomas DuBuisson