[R] help needed: taking a function out of a package and it can not find some funtions

Katharine Mullen kate at few.vu.nl
Tue Nov 6 21:22:40 CET 2007

bw.SJ calls C code from the file
You have to make this code available.

You can do the following:
1. copy bandwidths.c and the definition of bw.SJ (the latter renamed) to a
2. compile bandwidths.c into a shared library with the command
R CMD SHLIB bandwidths.c (see the manual writing R extensions for details)
3. in your definition of bw.SJ, in the 3 places .C is
called, remove "R_" from the first argument and quote it; e.g.,
C(R_band_phi4_bin, ..." becomes "C("band_phi4_bin","
4. in R, load the shared library you built with the dyn.load function; now
your definition of the (renamed) function bw.SJ can be modified as you

On Tue, 6 Nov 2007, Jason Liao wrote:

>  I tried to modify the R function bw.SJ (from the stats package) for my
> own use. But if I just get the source code and run directly (without any
> modification), it can no longer find some key functions called within
> it. I understand this has something to do with searching path which I do
> not understand well. Can anyone tell me how to modify the source code of
> an R function and still make it part of an existing package?
> Thanks.
> Jason Liao, http://www.geocities.com/jg_liao
> Associate Professor of Biostatistics
> Drexel University School of Public Health
> 245 N. 15th Street, Mail Stop 660
> Philadelphia, PA 19102-1192
> phone 215-762-3934
> ______________________________________________
> R-help at r-project.org mailing list
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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.

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