moisture: Volumetric moisture content

In DierckxSpline: R companion to "Curve and Surface Fitting with Splines"

Description

16 measurements of volumetric moisture content

Usage

data(moisture)

Format

a data.frame with the following columns:

• xproperty

• ymeasurement

• vconstant 1

• w Weight: constant 1 except for the first 2 and the last observations, being 10, 3, 10, respectively.

Details

Dierckx (1993, Table 7.2, pp. 129-131)

Source

Dierckx, Paul (1993), Curve and Surface Fitting with Splines, Springer.

Examples

data(moisture)
moisture # Dierckx, Table 7.2, p. 130
## Not run: 
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)

## End(Not run)

DierckxSpline documentation built on May 2, 2019, 6:30 p.m.