Find a suitable set of labels from an object for use in printing or plotting, for example. A generic function.
labels(object, …)Any R object: the function is generic.
further arguments passed to or from other methods.
A character vector or list of such vectors. For a vector the results
is the names or seq_along(x) and for a data frame or array it
is the dimnames (with NULL expanded to seq_len(d[i])).
Chambers, J. M. and Hastie, T. J. (1992) Statistical Models in S. Wadsworth & Brooks/Cole.