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...R *// UNPROTECT(6); return(ans); } The function "Projector" works well and actually the interface with .C works OK. The question is that I can compile it in R, but ".Call" returns different result each time with same inputs. Could anybody tell me why? Thanks! Regards Shangru -- Department of Mathematics, National University of Singapore, Blk S17, 10 Lower Kent Ridge Road, 119076 [[alternative HTML version deleted]]

...sm' or '__attribute__' before '{' token Projector2.c:28:1: error: expected '{' at end of input make: *** [Projector2.o] Error 1 Warning message: running command 'R CMD SHLIB Projector2.c Projector.c' had status 1 What's the problem? Thanks all! Regards Li Shangru -- Department of Mathematics, National University of Singapore, Blk S17, 10 Lower Kent Ridge Road, 119076 [[alternative HTML version deleted]]

...follow the instruction below using the example of foo.c http://www.stat.umn.edu/~charlie/rc/ I saved the foo.c in my work directory. Then I entered the command R CMD SHLIB foo.c , I got the following message Error: unexpected symbol in "R CMD" How did it go wrong? Thanks! Regards Shangru Li [[alternative HTML version deleted]]