interpolation function in R

Hi
does R provide some interpolation fucntions?
thank


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help.search("interpolation")

returns

interpSpline(splines)   Create an Interpolation Spline
periodicSpline(splines)
                        Create a Periodic Interpolation Spline
NLSstClosestX(stats)    Inverse Interpolation
approx(stats)           Interpolation Functions
spline(stats)           Interpolating Splines

for example. There may be others in packages I don't have installed as well.

HTH,

--sundar