[R] spline curves in R

From: Eric yang <yang_eric9_at_yahoo.com>
Date: Wed 10 Aug 2005 - 00:40:21 EST

Dear all,  

Is it possible to calculate the first and second derivatives of a cubic spline curve (interpolating through the points) as opposed to a smoothing spline? If so, how is this done? Is it also possible to find the equation of the spline curve that is fitted?  

Any help is much appreciated.  

TIA   Eric                 

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