Hi David, David Winsemius schrieb:
The splinefun documentation indicates that "natural" is one of the types of cubic spline options available.
That sounds good, didn't know that... rcs() has the advantage of coming with a book (Harrell's "Regression Modeling Strategies").
Does rcs actually do fitting? Such would not be my expectation on reading the documentation and I do not see any examples of such functionality in the help pages.
Nope, but you can include rcs() within fitting functions, lm(foo~rcs(bar,3)), which makes more sense to me than having a spline function fit... Looks like better encapsulation to me.
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