On Nov 30, 2012, at 10:02 AM, Donatella Quagli wrote:
Hello everybody, I have written a script with two inline cfunctions. The script crashes from time to time with: *** caught segfault *** address 0x10, cause 'memory not mapped' The crashs happen within R code after the cfunctions were executed. Nevertheless I think that the pointers in my cfunctions are not used correctly. I tried to find some examples for debugging tools. I found something like "R -d gdb". But I could not find an example how to use it with #!/usr/bin/Rscript. And I cannot source the script within a running R session because I must run it with some args. Can anybody tell me as a non nerd step by step what I can do to locate the problem? Can you recommend tools? If so how are they used with Rscript?
I think you may have difficulty defending your non-nerd claim if you are writing cfunctions in R. That said, you may want to look at a very recent SO answer by Hadley Wickham on StackOverflow: http://stackoverflow.com/questions/13661065/r-superimpose-histogram-fits-in-one-plot (I'm less nerdy than you, but it does appear that Hadley's code demonstrates efforts at checking for available memory and you may benefit from a worked example in Rcpp.)
David Winsemius, MD Alameda, CA, USA