identify(x, y, labels=seq(along=x), n=length(x),
plot=TRUE, offset=0.5, labpos=FALSE)
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.
|
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. |
labpos
|
if labpos 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).
|
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.
labpos is FALSE, identify returns an integer
vector containing the indexes of the identified points.
If labpos is TRUE, identify returns a list
containing a component ind, indicating which
points were an identified and a component labpos,
indicating where the labels were placed relative to the
identified points.