>From Martin Maechler:<quote> PS: Please guys, stop doing the following: 1. You want to post something to R-help. 2. You are too lazy to type r-help at r-project.org [the shortest of several possible addresses] 3. you reply to another __unrelated__ posting to R-help instead. ==> all threads are mixed up ! -- both on the mailing list archives, and on anyone's e-mail list who uses threaded e-mail presentation (e.g. me.) </quote> The enormous value of the mailing list archives is eroded by missing, poorly worded or downright wrong subject fields. A proper caption is an important part of articulating your problem. A poorly articulated query sends a signal to those generous souls who may reply -- it says, amongst other things, "I'm unlikely to have looked at the documentation." Not a good start, especially on this list. Regards, Mike -- Mike Nielsen <miken at bigpond.net.au>