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...g-native-routines but it seems only applicable to c(++) functions and not classes ... What am I missing ? Should/can linkingto be extended in a way that accomodates c++ Romain -- Romain Francois Professional R Enthusiast +33(0) 6 28 91 30 30 http://romainfrancois.blog.free.fr |- http://tr.im/NrTG : Rcpp 0.7.5 |- http://tr.im/MPYc : RProtoBuf: protocol buffers for R `- http://tr.im/KfKn : Rcpp 0.7.2

Hi the list, In a package P1, I write a function f1 in C, potentially an internal function (not to be called from R). In a package P2, I write a function f2 in C. The f2 function needs to use f1 from P1. Is it possible ? --- 8< ---- In file P1.c --------- double f1(x,y){ .... } --- 8< ---- In file P2.c --------- void f2(x,y,z){ double result; .... result = f1(x,y); .... }

R-exts.pdf discribes S3method a little bit. But I want to understand more on how it is called, implemented and when to use it. I don't find it in an R session. But I see S3method() in some NAMESPACE files. > S3method Error: object 'S3method' not found > ?S3method No documentation for 'S3method' in specified packages and libraries: you could try '??S3method' I