If I do: library(lattice) x <- 1:10 xyplot(x ~ x) grid.locator() and click on 2,2 say the I get this: > grid.locator() $x [1] 201native $y [1] 476native How do I get the user coordinates of the graph? (If I did not use lattice/grid I could have just done: plot(x ~ x) locator() and it would have worked as expected.)