Interactively identifies points on a cusum chart if a suitable
graphics device is being used.
USAGE:
identify.cusum(object, labels, ...)
REQUIRED ARGUMENTS:
object:
a "cusum" object.
labels:
vector giving labels for each of the points. If supplied, this must have
the same length as object$new.statistics if .chart.all = F and
the combined length of object$statistics and object$new.statistics
if .chart.all = T.
OPTIONAL ARGUMENTS:
...:
optional arguments taken from the argument list for identify.default.
VALUE:
indices of the identified points.
SIDE EFFECTS:
labels are placed on the current plot if plot = TRUE, the default for
identify.default.
DETAILS:
This function is a method for the generic function identify for class
"cusum". It can be invoked by calling identify for an object of the
appropriate class, or directly by calling identify.cusum regardless of the
class of the object.