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List:       r-devel
Subject:    Re: [Rd] largest acceptable lookup table in a package
From:       "Gabor Grothendieck" <ggrothendieck () gmail ! com>
Date:       2006-07-26 14:41:34
Message-ID: 971536df0607260741x74afc95m7a16199af5d40498 () mail ! gmail ! com
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A frame of reference based on:
   http://cran.r-project.org/src/contrib
is the quantiles of the size distribution of the compressed packages:

      0%       5%      25%      50%      75%      95%     100%
      58     5800    17000    62500   249500  1500000 15000000

On 7/26/06, Robin Hankin <r.hankin@noc.soton.ac.uk> wrote:
> Hi
>
>
> One of my packages needs a look-up table of pre-calculated
> numbers in the data directory.
>
> I would like to have the matrix as large as possible.
>
> What is the largest size matrix that would be an acceptable datafile in
> an R package?
>
>
>
> [
> The table is a square, upper triangular matrix
> consisting  of logs of Stirling numbers calculated by Maple.
>
> As discussed on the List a few days ago (thanks again David!)
> Stirling numbers  are computationally challenging;
> one needs exact integer arithmetic for very large
> integers  for their calculation (a 100x100 table requires  ~10^157)
> ]
>
>
>
>
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
>  tel  023-8059-7743
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

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