[Expm-developers] R package 'expm' - release to CRAN?

[David Firth]

Dear Martin

Thanks for your message.  I'd be very happy to see that on 
CRAN.

best wishes,
David

On Friday 18 June 2010 11:47:50 Martin Maechler wrote:
> Dear 'expm' co-developers,
>
> After Michael Stadelmanns master thesis finished here at
> ETH, more than a year ago, which provided one or two new
> state-of-the-art matrix exponential algorithms, and the
> Matrix-Log + Matrix-Sqrt, not much has happened
> though I've noticed that Nick Higham has produced yet
> another improvement to his algorithm, namely:
>
>     author =    {Awad H. Al-Mohy and Nicholas J. Higham},
>     year =      2009,
>     title =     {A New Scaling and Squaring Algorithm for
> the Matrix Exponential}, journal =   {SIAM Journal on
> Matrix Analysis and Applications}, volume =    31,
>     number =    3,
>     pages =     {970-989},
>
> ( I have added the reference to expm/inst/doc/expm.bib )
>
> But our 'expm' package is still only on R-forge and hence
> not really much visible in the R using comunity.
> Also, the recommended Matrix package which has provided
> expm() for a long time, still only provides "Ward77"
> which is clearly sub-optimal given Higham's work.
>
> OTOH, in some way, 'expm' is now an "extension" to the
> Matrix package (as it 'Depends' on it anyway, e.g. for
> using  Matrix::norm()), providing extra features.
>
> In light of this, I'd like to release 'expm' to CRAN
> ASAP, and just wanted to get feedback from you before
> doing that.
>
> Best regards,
> Martin
>
> Martin <Maechler at stat.math.ethz.ch> 
> http://stat.ethz.ch/people/maechler Seminar für
> Statistik, ETH Zürich  HG G 16      Rämistrasse 101
> CH-8092 Zurich, SWITZERLAND
> phone: +41-44-632-3408       fax: ...-1228      <><
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