[R] random number generator?
ripley at stats.ox.ac.uk
Wed Jan 29 20:56:03 CET 2003
On Wed, 29 Jan 2003, Paul Gilbert wrote:
> If reworking the RNG mechanism is considered seriously (and I am not advocating
> that), I suggest:
> 1/ There should be a simple mechanism for keeping track of and resetting all the
> information to generate random numbers, that is, seed, uniform generator, and
> transformations. (I have a package, which I intend to distribute shortly, that
> does this for normal distributions and might form a basis for this mechanism. It
> was previously part of my syskern package in dse, and so the mechanism has been
> fairly well tested over several years.)
That's what RNGkind and set.seed do, and have done for a long time.
The information is also stored in .Random.seed, but few users would record
that (and it does not exist until the first RNG is used).
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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