G'day David,
>>>>> "DK" == David Kinniburgh <[EMAIL PROTECTED]> writes:
DK> I have used Mike Powell's optimization routine (VA05AD) from
DK> the Harwell Subroutine Library (HSL) for more than 20 years.
DK> [...]
DK> Now that I have converted to R, I will miss my trusted
DK> friend. I have started using nls() but have not accumulated
DK> enough experience to compare the two. It would be great if
DK> VA05AD could be an option in there (algorithm="Powell"). To
DK> this end, I recently enquired of the custodians of the HSL
DK> whether it would be possible to make it freely available to
DK> the R community. The answer was basically 'yes'. [...]
You better ask again. :-)
I presume VA05AD is in what is now called the HSL archive? If it is
part of HSL 2004, then I don't see a way how it could be incorporated
into R given the information on their web site.
Even for the HSL archive, it is stated at
http://hsl.rl.ac.uk/archive/hslarchive.html that
"[...] HSL Archive codes are now available without charge to
anyone, so long as they are not then incorporated into a
commercial product; the latter is, of course, still permitted
subject to a commercial licence. [...]"
which sounds as if it would be possible to interface (parts of) HSL
archive to R. But then that URL goes on ans states:
"Access to the Archive is by means of a short-lived individual
password-controlled account. Potential users are asked for
brief details of the use they intend to make of the package(s)
they aim to download. Users are also asked to accept a
conditions-of-use form, and are not permitted to divulge their
userid and password to anyone else, nor to distribute any
codes they obtain to a third party."
IANAL, but as I understand the GPL, the last part of that sentence
will make it pretty impossible to incorporate into R (or distribute as
an R package) (parts of) the HSL archive routines.
Cheers,
Berwin
========================== Full address ============================
Berwin A Turlach Tel.: +61 (8) 6488 3338 (secr)
School of Mathematics and Statistics +61 (8) 6488 3383 (self)
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