Is function compiled code or not?

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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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
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