Thank you for the reply. The more I look at this, the more confused I become. I was wondering if you could walk me through this a little more in detail, in particular the panel method function of doing things. It may be obvious to many, but I haven't really used Trellis before, so I'm still at the bottom of the learning curve.
I get that you are identifying a specific color with the variable "mycols" I get that you are identifying panel/packet 4 as the one to receive the different color in "whichpan" and I get that you are plotting the different colored points with panel.xyplot I think what confuses me the most is the "whichpan" variable - what does the "1+" do? -- View this message in context: http://r.789695.n4.nabble.com/Displaying-data-in-Trellis-tp4567920p4570271.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.