Message-ID: <3ED791F2.4030503@stat.ucla.edu>
Date: 2003-05-30T17:16:34Z
From: Roger D. Peng
Subject: Normal deviate generation - Marsaglia's ziggurat method
In-Reply-To: <59e9155a222e.5a222e59e915@jhsph.edu>
Since it is available in the `SuppDists' package, why do we need it in
the `base' package? There are perhaps hundreds of useful functions that
exist in external packages that are not in `base'. My understanding was
that one goal was to keep `base' from getting too bloated.
-roger
Ravi Varadhan wrote:
> Hi:
>
> I was wondering why Marsaglia's new ziggurat method for generating
> deviates from the standard normal distribution has not been implemented
> in the R base package. I know that it is available in SuppDists
> pacakage of Bob Wheeler, as "rziggurat". According my timing tests, it
> is about 6 to 7 times faster (on a Pentium 2.4 MHz) machine than the
> default Inversion method used in R base package.
>
> thanks,
> Ravi.
>
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