[R] drawing a rectangle through multiple plots

[Martin Maechler]

Hi Greg,

to attach files in e-mails for R-help, you must use the
"text/plain" MIME type; if you can't do this with your e-mail software, 
(besides considering to change your e-mail software :-)
- either put the file up for FTP or HTTP and only publish the URL
  on R-help
- or ``cut & paste'' into your message
  (with the well know "wrap around problems for people who like
  to have source files with lines that extend to more than about
  70 characters).

Regards,
Martin Maechler, R list maintainer, ETH Zurich