On Jul 30, 2015, at 8:37 AM, sbihorel wrote: > Hi, > > When the as.layer function is used to overaly 2 lattice plots, there seems to > be an assumption that the data used in both plots will generate the same > number of panels (and, I believe, in the same order). In case the data used > in the plot within the as.layer call is incomplete , data may be plotted on > the "wrong" panel, and data seem to get re-used on the last panel(s). See > what happens in the example code below when the records with > state.region=="South" are dropped... > > Is there a trick to overlay panel based upon the conditioning variable value > rather than the panel order? > > require(lattice) > require(latticeExtra) > state2 <- state <- data.frame(state.x77,state.region) > state2$Income <- sample(state2$Income) > state3 <- state2[which(state2$state.region!="South"),] > foo <- xyplot(Income~Population|state.region,data=state,main='foo') > foo > > bar <- update(foo,main='bar') + > as.layer(xyplot(Income~Population|state.region,data=state2,col='red')) > bar > > bar2 <- update(foo,main='bar2') + > as.layer(xyplot(Income~Population|state.region,data=state3,col='red')) > bar2
I don't know if this works using the `+.lattice` function but it is possible to selectively update panels using `trellis.focus` -- David. > > Thank you > > Sebastien > > PS: I know that I could get what I want by setting the Income variable to NA > for records with state.region=="South" instead of dropping them... but this > is not the point of my example. I am just trying to illustrate what happens > when as.layer is used for plotting data with inconsistent dimensions. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
