This will do it for the directory emacs-backup:
(setq backup-directory-alist `(("." . ,(expand-file-name "~/emacs-backup"))))
Simple, huh?
emacs-backups
(/progtricks)
2004-01-21, 11:44
[edit]
© M. Vallisneri 2012 — last modified on 2010/01/29
Tantum in modicis, quantum in maximis