search for: my_c

Hello, I try to write an extension in C, to get a faster functions. Therefore I have to add an element (vector) to a vector. The command in R is very simple: x = c(x,a) But in C I have the problem to reallocate my vector for getting more space. Everything I tried, I get a "Segmentation fault". So, how can I combine two vectors in C and give the result back to R (return(x))? Thanks

A few years ago I used the following to compile a shared object that I wanted to call from R and it worked just fine. R CMD SHLIB -o ~/my_C/R.shared.so/cocite.mat.so cocite.mat.c Now when it is executed?I receive the following error message: make: *** No rule to make target `cocite.mat.o', needed by `/home/mkimpel/my_C/R.shared.so/cocite.mat.so'. Stop. I've consulted R CMD SHLIB --help and R-exts.pdf and neither indicates...

...happy to share more of my R and C code if that is helpful, but I wanted to avoid a very long post at this point. Thanks, Mark > dyn.load(x = c.code, local = TRUE, now = TRUE) Error in dyn.load(x = c.code, local = TRUE, now = TRUE) : unable to load shared library '/N/u/mkimpel/BigRed/my_C/R.shared.so/cocite.mat.true.parallel.so': /N/u/mkimpel/BigRed/my_C/R.shared.so/cocite.mat.true.parallel.so: undefined symbol: ompi_mpi_comm_world > sessionInfo() R version 2.7.0 Under development (unstable) (2008-01-05 r43880) powerpc64-unknown-linux-gnu locale: LC_CTYPE=en_US.UTF-8;L...