[R] exact relative positioning of lattice plots

[John G. Bullock]

> In your actual use case, are there any annotations outside the panel
> (tick marks, labels, etc.)? Things would be much simpler if not (as in
> your example). In that case, just call the suitable panel function
> after setting up the proper axis limits (after doing pushViewport or
> seekViewport or whatever).
>
> If you do have extra annotation, you need to decide how much space
> they should have.

Thank you.  Yes, my actual use case does have annotations outside the panel.  Even so, this is helpful.

John