Returns the cursor coordinates and panel number
in a 2 dimensional trellis plot.
USAGE:
locator.2dtrellis(x, n, ...)
REQUIRED ARGUMENTS:
x
The output of the
xyplot function, or other function that
creates an object in the class
2dtrellis.
n
The maximum number of points to locate.
OPTIONAL ARGUMENTS:
...
Unrecognized arguments will be passed to
locator.
VALUE:
A list with components x, y, and panel, each of length
n
(or smaller, if the selection process was aborted early).
The x and y coordinates are in the coordinate system of
the corresponding panel.
SIDE EFFECTS:
If the
type argument to
identify is used some marks may
be plotted at the selected points.
SEE ALSO:
,
.
EXAMPLES:
tmp <- xyplot(Life.Exp~Frost|Region,
data=data.frame(state.x77, Region=state.region)
tmp # to actually make the plot
locator(tmp, 4)