On Mon, 25 Jul 2005 lma5@(protected):

> My question is how to write a periodic function in R.
> for example if there is a function f(x) that
> f(x)=f(x+4), for -2<x<2, f(x)=x
> how to write it in R?

f((x+2)%%4 - 2) is one way.


--
Brian D. Ripley,            ripley@(protected)
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford,         Tel: +44 1865 272861 (self)
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