[ 源代码: spline ]
软件包:spline(1.2-5 以及其他的)
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