moisture {DierckxSpline} | R Documentation |
16 measurements of volumetric moisture content
data(moisture)
a data.frame with the following columns:
Dierckx (1993, Table 7.2, pp. 129-131)
Dierckx, Paul (1993), Curve and Surface Fitting with Splines, Springer.
data(moisture) moisture # Dierckx, Table 7.2, p. 130 f1 <- with(moisture, concon(x, y, w, v, s = 0.2)) f2 <- update(f1, s = 0.04) f3 <- update(f1, s = 0.0002) g1 <- with(moisture, curfit(x, y, w, method = "ls", knots = knots(f1))) g2 <- update(g1, knots = f2) g3 <- update(g1, knots = f3)