R help - Jul 2008 - Lattice Version of grconvertX or variant on panel.text?

Still playing with Lattice...

I want to use panel.text(x, y etc) but with x and y in plot coordinates
(0,1), not user coordinates.

I think if I had this problem with traditional graphics, I could use
grconvertX to make the change.  I did come across convertX {grid} but this
doesn't seem to be what I need.

Is there a function like grconvertX in Lattice, or is there a flag or some
other method of making panel.text use plot coordinates?

Thanks, Bryan

On Sun, Jul 20, 2008 at 6:03 PM, Bryan Hanson <hanson at depauw.edu>
wrote:
> Still playing with Lattice...
>
> I want to use panel.text(x, y etc) but with x and y in plot coordinates
> (0,1), not user coordinates.
>
> I think if I had this problem with traditional graphics, I could use
> grconvertX to make the change.  I did come across convertX {grid} but this
> doesn't seem to be what I need.
Looking at the code for panel.text (lattice:::ltext.default) it looks
like the easiest way to go would be to call grid.text directly,
specifying the units ("npc") that you want to use.

Hadley


-- 
http://had.co.nz/

Never mind, I just hard-coded it using ratios.  Simpler than I thought.
Thanks, Bryan


On 7/20/08 9:03 PM, "Bryan Hanson" <hanson at depauw.edu> wrote:
> Still playing with Lattice...
> 
> I want to use panel.text(x, y etc) but with x and y in plot coordinates
> (0,1), not user coordinates.
> 
> I think if I had this problem with traditional graphics, I could use
> grconvertX to make the change.  I did come across convertX {grid} but this
> doesn't seem to be what I need.
> 
> Is there a function like grconvertX in Lattice, or is there a flag or some
> other method of making panel.text use plot coordinates?
> 
> Thanks, Bryan
> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.

Use grid.text instead:

library(lattice)
library(grid)
xyplot(demand ~ Time, BOD, panel = function(...) {
   panel.xyplot(...)
   grid.text("Some text", .1, .1) # near lower left
})


On Sun, Jul 20, 2008 at 9:03 PM, Bryan Hanson <hanson at depauw.edu>
wrote:
> Still playing with Lattice...
>
> I want to use panel.text(x, y etc) but with x and y in plot coordinates
> (0,1), not user coordinates.
>
> I think if I had this problem with traditional graphics, I could use
> grconvertX to make the change.  I did come across convertX {grid} but this
> doesn't seem to be what I need.
>
> Is there a function like grconvertX in Lattice, or is there a flag or some
> other method of making panel.text use plot coordinates?
>
> Thanks, Bryan
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
>