Hi all, here others doubts, when load and running the function
void gdot(double *x,double *y,int *n,double *output){ int i; *output=0; for (i=0;i<*n;i++){ *output+=x[i]*y[i]; } } as following /examplesC$ R CMD SHLIB xby.c gcc -std=gnu99 -I/usr/share/R/include -I/usr/share/R/include -fpic -g -O2 -c xby.c -o xby.o gcc -std=gnu99 -shared -o xby.so xby.o -L/usr/lib/R/lib -lR /examplesC$ R >x<-c(1,4,6,2) >y<-c(3,2.4,1,9) > dyn.load("xby.so") >product<-.C("gdot",myx=as.double(x),myy=as.double(y),myn=as.integer(NROW(x)),myoutput=numeric()) *** caught segfault *** address (nil), cause 'memory not mapped' Traceback: 1: .C("gdot", myx = as.double(x), myy = as.double(y), myn = as.integer(NROW(x)), myoutput = numeric()) Possible actions: 1: abort (with core dump) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace Selection: Selection: Selection: Can anybody answerme that happening with this Traceback? Thanking you in advance, Bernardo Lagos A. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.