[R] interpolation and numerical differentiation in R ?

[Prof Brian D Ripley]

On Sat, 1 Sep 2001, Robert D. Merithew wrote:

>
>
> On 1 Sep 2001, Douglas Bates wrote:
>
> > See interpSpline in the splines library.
> >
> > When evaluating the interpolating spline produced by interpSpline you
> > can specify that you want derivatives instead of the function value.
>
> perfect.  I'd use predict.bSpline, it seems.
>
> My problem was that I started looking in the wrong place. I was wandering
> around the documentation on the web site, which I was unable to search
> (pdf files).  Now that I've installed R, and can search I see that R has
> an enormous number of functions which will be useful to me.  I didn't get
> that impression from the 'Basics' book, though the book will be very
> helpful as I get used to the data structures.

Well, it is a basic book, not really a book on Basics of the language.
You didn't say which edition: both are about S-PLUS not R, and the current
Second Edition is mainly aimed at GUI-using users of S-PLUS 2000.

I'd say the other books mentioned in the R FAQ were better for your
purposes, although none hit exactly this (which is only in R).

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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