[Rd] How to debug C code running in R

Hi, I am in the situation where I could get my code run correctly under GNU C, but it produced different (strange) results while running in R . ( I use .C to call the function). May I get some general advice on how could I do step by step debug of source code in R ? Thanks ___

[Rd] dput/dget when a data frame has 2 rows (PR#9627)

This doesn't seem right; I'm using R version 2.4.1 (2006-12-18) on Mac OS and Win XP and find the same issue: > mydataframe <- data.frame(ppi=c(.5,.5),mmu=c(5,10)) > dput(mydataframe,"mydataframe.txt") > dget("mydataframe.txt") Error in attributes(.Data) <- c(attributes(.Data), attrib) : row n