Dear list, I'm trying to get two lattice plots aligned on a page. They should share a common x axis, hence the need for perfect alignment, but the data is taken from unrelated, separate sources (it is therefore inappropriate to combine them and use facetting to get an automatic layout: the legend and y axis need to be different). I can get the panels to be of the same size, but they have an horizontal offset due to a differing size of the legend / ylabel. Here's an example of what I've tried, library(grid) library(lattice) x <- seq(0, 10, length=100) y <- sin(x) f <- rep(c("1", "2"), each=50) p1 <- xyplot(y~x,groups=f, ylab="BIG LABEL", auto.key=list(space="right")) p2 <- xyplot(y~x, ylab="a") pushViewport(viewport(layout=grid.layout(nrow = 2, ncol = 1 , widths=unit(6, "inches"), heights=unit(c(3, 2), "inches")))) pushViewport(viewport(layout.pos.col=1, layout.pos.row=1, just="center", name = "top")) print(p1, newpage=F, panel.width=list(4, "inches"), panel.height=list(2.5, "inches")) upViewport() pushViewport(viewport(layout.pos.col=1, layout.pos.row=2, just="center", name = "bottom")) print(p2, newpage=F, panel.width=list(4, "inches"), panel.height=list(1.5, "inches")) upViewport() I'm sure there is a clever trick to get the panels to be aligned as opposed to the whole plots, but I can't see it. Many thanks, baptiste _____________________________ Baptiste Augui? School of Physics University of Exeter Stocker Road, Exeter, Devon, EX4 4QL, UK Phone: +44 1392 264187 http://newton.ex.ac.uk/research/emag