[R] how to get f(x)=___ from a piecwise function
Eric C. Jennings
matheric at u.washington.edu
Sun Feb 26 05:47:13 CET 2006
>From actual real-world readings, I have two vectors:
x<- c(-100.4, 32.0, 99.8, 200.2, 300.6, 399.8, 500.0, 600.0, 699.6, 799.6,
899.8)
y<- c(0.4, 0.0, 0.2, -0.2, -0.6, 0.2, 0.0, 0.0, 0.4, 0.4, 0.2)
which, in the usual way constitute a continuous piecewise function.
What I want to do is find an easy method to get at f(x) for some x I have
NOT specified in the above vector. For example I want f(356).
I have already put the time and effort in to write a program to compute this
by breaking the function into the various pieces and computing the slopes of
the individual lines etc. etc.
I am just looking to find an easier method.
Thank you for your help.
Eric
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