I know that lots of first-time posters don't read the posting guide, but for those that do ... I often find myself pointing out to posters that they should include relevant details about their subject area -- that R-helpers are not necessarily experts on options trading, population genetics, or whatever they happen to be doing ... Ben Bolker -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 252 bytes Desc: OpenPGP digital signature URL: <https://stat.ethz.ch/pipermail/r-devel/attachments/20080528/2a25eebc/attachment.bin>