On Dec 1, 2012, at 5:09 AM, Steve Stephenson wrote:
Hallo,
I'm facing a problem and I would really appreciate your support.
I have to translate some Matalb code in R that I don't know very
well but I
would like to.
I have to interpolate 5 point with a cubic spline function and then
I expect
my function returns the Y value as output a specific X value inside
the
evaluation range. Let's suppose that:
1- *X = [-10, -5, 0, 5, 10]*
2 - *Y = [12, 10, 8, 7, 6]*
3 - *I have to interpolate with a cubic spline assuming x=11*
In Matlab I used this function:
*y = interp1(X, Y, x, "cubic"); *
How can I do the same in R?
Many thanks in advance for your reply and support!
splinefun( x = c(-10, -5, 0, 5, 10),
y = c(12, 10, 8, 7, 6),
method="natural")(11)
[1] 5.785714
--
David Winsemius, MD
Alameda, CA, USA
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