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

[Christophe Dutang]

Idem, I'm very happy expm to be released on CRAN, and any JSS publication are also welcome.

Christophe

Le 18 juin 2010 à 08:31, David Firth a écrit :

> 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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> 
> 
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--
Christophe Dutang
Ph.D. student at ISFA, Lyon, France
website: http://dutangc.free.fr