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

[Douglas Bates]

On Fri, Jun 18, 2010 at 7:47 AM, Christophe Dutang <dutangc at gmail.com> wrote:
> Idem, I'm very happy expm to be released on CRAN, and any JSS publication are also welcome.

Fine with me.

> 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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>>> Expm-developers at lists.r-forge.r-project.org
>>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listi
>>> nfo/expm-developers
>>
>>
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>
> --
> Christophe Dutang
> Ph.D. student at ISFA, Lyon, France
> website: http://dutangc.free.fr
>
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