Dear Paul, I can't think of a way to do what you want using the plot() methods provided by the package. (You don't say what kind of model you're fitting, but this is true for all of the plot() methods.) On the other hand, as described in ?effect, the object returned by effect() contains all of the information needed to construct a custom graph, and you should be able to easily get what you want.
I hope this helps, John ------------------------------ John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Prew, Paul > Sent: April-28-09 12:00 AM > To: r-help@r-project.org > Subject: [R] effects package --- add abline to plot > > Hello, I am not having success in a simple task. Using the effects package, > I would like to add reference lines at probability values of 0.1 b ______________________________________________ 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.
