On Thursday 12 February 2004 03:12, Wolfram Fischer - Z/I/M wrote: > How to show panels for factor levels of conditioning variables > which do have no values? > > E.g. there are panels for "Grand Rapids" when they have values: > data( barley ) > with( barley, dotplot(variety ~ yield | year * site, layout=c(6,2) ) ) > > There are no panels for "Grand Rapids" > when there are no values for "Grand Rapids": > my.barley <- subset( barley, ! ( site == "Grand Rapids" ) ) > with( my.barley, dotplot(variety ~ yield | year * site, layout=c(6,2) ) ) > > But there is a level "Grand Rapids": > levels( my.barley$site ) > [1] "Grand Rapids" "Duluth" > [3] "University Farm" "Morris" > [5] "Crookston" "Waseca" > > Is there an option to show empty panels for "Grand Rapids" in > ``my.barley''?
No, unused factor levels are dropped. I'll see if adding an option for this is feasible. Deepayan ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
