This looks like an application for bottom.strips and right.strips, in addition to the current left.strips and strips, in each panel. The new feature is that these new strips might be associated with different information than the regular strips that reflect the levels of the conditioning variables.
______________________________________________ R-help@stat.math.ethz.ch 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.
