(x,y) coordinates for grid.text()

You want "native" coordinates.  But since you are using lattice (built
'on top' of grid), you probably need some additional info, like the name
of the viewport you want to write to I assume(?), but I can't help you
with that part.


David Afshartous wrote:

Okay, I see that default.units is set to "npc" and hence the behavior I
mentioned.  Looking at ?unit, I see the description of various units but it
isn't clear which one I need to select to achieve the result I specified
earlier.  Maybe I'm missing something very basic, but I assume there must be
a simple way to add text to an xyplot() at a specified (x,y) coordinate in
the units of the plotted points?





On 3/4/08 12:18 PM, "hadley wickham" <h.wickham at gmail.com> wrote:

 When using grid.text it seems my supplied (x,y) coordinates are being
 plotted only in npc (normalized parent coordinates) where (.5,.5) is the
 center of the graph.  How do I allow (x,y) to be coordinates corresponding
 to the (x,y) values in the graph?   The examples in ?grid.text seem to do
 this.  (I think the problem lies in how x and y are defined with respect
to
 unit ).   Any help much appreciated.  Sample code below.

Have you read the documentation for grid.text?  You need to read the
description of the default.units argument and then read ?unit.

Hadley