On 04/08/2011 09:44 AM, Stefan Petersson wrote:
> Hi,
>
> Sorry for my ignorance, but how can I see if a function is 'compiled code' or
> plain R? E.g. the daisy
> function from the cluster package.
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Hi,
Look at the sources of the function and look for .C or .Fortran. In the
case of daisy there is a call to a fortran routine:
disv <- .Fortran(cl_daisy, n, p, x, if (mdata) valmd else double(1),
as.double(weights), if (mdata) jtmd else integer(1),
jdat, type3, ndyst, as.integer(mdata), dis = double((n *
(n - 1))/2), NAOK = TRUE, DUP = FALSE)$dis
An easy way to look at sources is to type the command at the command
line without the parentheses, e.g.:
> daisy
cheers,
Paul
--
Paul Hiemstra, MSc
Global Climate Division
Royal Netherlands Meteorological Institute (KNMI)
Wilhelminalaan 10 | 3732 GK | De Bilt | Kamer B 3.39
P.O. Box 201 | 3730 AE | De Bilt
tel: +31 30 2206 494
http://intamap.geo.uu.nl/~paul
http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770
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