Dear members of the list, I'm a beginner in R and I'm having some trouble with: "Error in optim(init[mask], armafn, method = "BFGS", hessian = TRUE, control = optim.control, : non-finite finite-difference value [8]"
when running "arima". I've seen that some people have come accross the same problem: https://stat.ethz.ch/pipermail/r-help/2008-August/169660.html So I'd like to modify the code of arima to change the optimization function with another one that handles these problems automatically , however I don't find the way to do it and http://tolstoy.newcastle.edu.au/R/e6/help/09/01/2476.html points out a way that doesn't work for me: * If I type edit(arima) and I modify it, changes are not saved, * If I copy the code and I save it like a different function, I get the hard error: "Error in Delta %+% c(1, -1) : object "R_TSconv" not found" Anybody can give me a hint? I miss matlab's easy way of doing this ("edit function.m"). Thanks in advance MarC (AleaSoft) [[alternative HTML version deleted]] ______________________________________________ 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.
