identify(x, ...) identify.default(x, y = NULL, labels = seq(along = x), pos = FALSE, n = length(x), plot = TRUE, offset = 0.5, ...)
x,y
|
coodinates of points in a scatter plot. Alternatively, any
object which can defines coordinates (a plotting structure, time
series etc.) can be given as x and y left undefined.
|
labels
|
an optional vector, the same length as x and
y , giving labels for the points.
|
pos
|
if pos is TRUE , a component is added to the
return value which indicates where text was plotted relative to each
identified point (1=below, 2=left, 3=above and 4=right).
|
n
| the maximum number of points to be identified. |
plot
|
if plot is TRUE , the labels are printed at
the points and if FALSE they are omitted.
|
offset
| the distance (in character widths) which separates the label from identified points. |
...
|
further arguments to par(.) .
|
x
and y
for the point closest to the pointer.
If this point is close to the pointer, its index will be returned as
part of the value of the call.
If in addition, plot
is TRUE
the point is labelled with
the corresponding element of text
.
The labels are placed either below, to the left, above or to the right of the identified point, depending on where the cursor was.
The identification process is terminated by pressing any mouse button other than the first, or by clicking outside the graphics window.
pos
is FALSE
, identify
returns an integer
vector containing the indexes of the identified points.
If pos
is TRUE
, identify
returns a list
containing a component ind
, indicating which points were an
identified and a component pos
, indicating where the labels
were placed relative to the identified points.