titanium {DierckxSpline} | R Documentation |
49 values expressing a thermal property of titanium.
data(titanium)
a data.frame with the following columns:
Famous example used by de Boor and Rice (1968), Jupp (1978), Dierckx (1993) and perhaps others.
de Boor, C., and Rice, J. R. (1986), Least-squares cubic spline approximation. II: variable knots. Report CSD TR 21, Purdue U., Lafayette, IN.
Dierckx, Paul (1993), Curve and Surface Fitting with Splines, Springer.
Jupp, D. L. B. (1975), Approximation to data by splines with free knots, SIAM Journal on Numerical Analysis, 15: 328-343.
data(titanium) r <- curfit.free.knot(titanium$x2, titanium$y, g = 10, eps = 5e-4) xyplot(r, show.knots = TRUE)