In the event those org files are part of your org agenda, there is an
inbuilt command to do that: org-cycle-agenda-files

C-'     (org-cycle-agenda-files)
C-,    Cycle through agenda file list, visiting one file after the other.

http://orgmode.org/manual/Agenda-files.html
On Oct 19, 2015 7:06 AM, "John Kitchin" <jkitchin@andrew.cmu.edu> wrote:

> this feels kind of hacky, but it seems to do what you want:
>
> (setq my-files '("a.org" "b.org" "c.org"))
>
> (defun my-next-file ()
>  (interactive)
>  (let ((f (pop my-files)))
>    (add-to-list 'my-files f t)
>    (find-file f)))
>
> (defun my-previous-file ()
>   (interactive)
>   (let* ((r-my-files (reverse my-files))
>          (f (pop r-my-files)))
>     (add-to-list 'r-my-files f t)
>     (setq my-files (reverse r-my-files))
>     (find-file f)))
>
> (global-set-key (kbd "s-<right>") 'my-next-file)
> (global-set-key (kbd "s-<left>") 'my-previous-file)
>
> the my-files var is not saved, so the order will not persist when you
> close emacs.
>
>
> Xebar Saram writes:
>
> > Hi all
> >
> > I know this should be easy (for anyone that knows elisp that is :)). how
> > does one create a function that cycles up/down through a list of pre
> > defined buffers/files?
> > for example i want to cycle (ie open and show in the emacs window)
> through:
> > A.org B.org C.org
> > i want to use ie A-left and A-right to open (if not already) and cycle
> > through these files. any one has such a system?
> >
> > best
> >
> > Z
>
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu
>
>