I have a question that might not be "kosher" here, but I'm running out of options and need some help. Basically using the function "step" is freezing R. I am running a model that includes a number of interactions on a large data set with a number of dummy variables representing whether an event occurred or not. Here's a simplified example -
fit = lm(a~b*(c+d+e)*(f+g+h)*(i+j+k)) regs = step(fit) at this point R freezes and alternates between "Not Responding" and "Running" in Windows task manager. It wasn't always this way. I was able to run the same model on the same dataset a couple weeks ago and while it took the step function 20-30 minutes to compute the best AIC and didn't exclude all the insignificant variables/interactions, it served its purpose. Even after uninstalling and reinstalling R and RExcel (which I used to load the data set), the problem persists. I tried it on a smaller data set and still no luck. This is more of a computing issue, so if anyone can point me to a forum better equipped to help me out, I will owe you my eternal gratitude. I hate to fill up space with such an uninspired question, but like I said I'm running out of options. Thanks, JGS ______________________________________________ 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.
