パッケージ: spline (1.2-6)

Akima spline interpolation

aspline(1) interpolates an Akima-spline through a series of given points. The Akima-spline interpolation approximates a manually drawn curve better than the ordinary splines, but the second derivative is not continuous.

The Akima-spline algorithm is described in "A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures", H. Akima, J. Assoc. Comput. Mach., 17(4), 1970, pp. 589-602. doi:10.1145/321607.321609

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