This example then specifies a smoothed spline interpolation method on the GRID statement. As shown by the following output, the resulting surface plot is smoother still. libname reflib ...

Periodic Hermite spline interpolants on an equidistant lattice are represented by the Bézier technique as well as by the B-spline method. Circulant matrices are used to derive new explicit formulas ...

libname reflib 'SAS-data-library'; goptions reset=global gunit=pct border cback=white colors=(black blue green red) ftext=swiss ftitle=swissb htitle=6 htext=3; title 'Surface Plot after Partial ...

This paper is concerned with the problem of existence of monotone and/or convex splines, having degree $n$ and order of continuity $k$, which interpolate to a set of ...