On Fri, Jan 25, 2013 at 6:11 AM, Ray Cheung <ray1...@gmail.com> wrote: > Dear Michael, > > Thanks for your codes. However, lapply does not work in my case since I've > some files missing in the data (say, the file data101.dat). Do you have any > suggestions on this?? Thank you very much. >
You could simply add a test using file.exists() but I'm not sure what you want to do with the M matrix then -- omit the slice (so the others are all shifted down one) or fill it entirely with NA's. Michael ______________________________________________ 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.
