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Re: Random number generation : requirements

Subject: Re: Random number generation : requirements
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 6 May 2014 17:13:57 -0000
Re:  Random number generation : requirements
This has been implemented in pure XSLT 1 and is part of FXSL since 2002:

http://fxsl.sourceforge.net/articles/Random/Casting%20the%20Dice%20with%20FXS
L-htm.htm

There is generation of the "next" random number from the "current"
(essentially  a functional composition, where the n-th random number
is f^N(seed), generation of a random sequence, generation of a
sequence of numbers with probability distributions over
non-overlapping intervals, etc.

There is even Monte-Carlo Integration method - based test :)

Cheers,
Dimitre



On Tue, May 6, 2014 at 9:54 AM, Michael Kay mike@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> The W3C WGs are looking at the idea of introducing a random-number function
of some kind in XPath 3.1. The challenge of course is making this both usable
and a pure function with no side-effects. We have various design ideas which
we need to test against requirements.
>
> If you have any applications that use or need such a function, please could
I have a brief description of the way it uses random numbers, e.g. just
wanting a single random number, a random permutation of 52 integers, an
arbitrary sequence of random numebrs for test data generation, etc.
>
> If you're currently using the EXSLT random-sequence() function, please share
your experience with it.
>
> Michael Kay
> Saxonica

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