[R] Find Crossover Points of Two Spline Functions

[Ben Bolker]

Bert Gunter <bgunter.4567 <at> gmail.com> writes:

> 
> Use ?uniroot to do it numerically instead of polyroot()?
> 
> Cheers,
> Bert
> Bert Gunter

  The problem with uniroot() is that we don't know how many intersections/
roots we might be looking for. With polyroot(), we know that there can
be at most 3 roots that lie within a particular cubic segment.

  (I'm not arguing that doing this is necessarily a good idea in
the larger context.)