[Rd] segments and arrows generic?

From: <Bill.Venables_at_csiro.au>
Date: Wed 31 Jan 2007 - 01:52:27 GMT

Has anyone ever suggested making segments() and arrows() generic (as indeed they are in another not dissimilar implementation)?

The practical issue with these functions is the need to specify origin and destination using four separate arguments. It would be much more convenient to use only two. If segments were (S4) generic, for example, you could write methods for

signature(x0 = "matrix", y0 = "matrix", x1 = "missing", y1 = "missing") signature(x0 = "complex", y0 = "complex", x1 = "missing", y1 = "missing")

With the present function as the default method, no existing working code would be affected.

Bill Venables



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