[R] importing data

[R. Michael Weylandt]

On Fri, Jan 25, 2013 at 6:11 AM, Ray Cheung <ray1728 at 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