asphalt: Asphalt Rutting Data

In lassogrp: Lasso Regression Including Group Lasso and Adaptive Lasso

Description

Measurement series on the rutting of asphalt in function of some of its material properties.

Usage

data(asphalt)

Format

A data frame with 31 observations on the following 7 variables

VISC

numeric; the viscosity of the asphalt.

ASPH

numeric; the percentage of asphalt in the surface course.

BASE

numeric; the percentage of asphalt in the base course.

RUN

a vector of 0:1 values, indicator of the two runs of measurements.

FINES

numeric; 10* percentage of fines in surface course.

VOIDS

numeric; percentage of voids in surface course.

RUT

numeric, the “rate of rutting”, i.e. the change of rut depth in inches per million wheel passes.

Details

Typical model for regression teaching, including variable transformations.

Source

Gorman, J.W. and Toman, R.J. (1966). Selection of Variables for Fitting Equations to Data; Technometrics 8, 27–51.

Daniel, C. and Wood, F.S. (1980). Fitting Equations to Data, 2nd ed., Wiley, N.Y.

References

Detailed applications in Daniel and Wood, 6.5, p. 95~ff.

Examples

data(asphalt)
pairs(asphalt, gap = .1)
pairs(asphalt[, -4], gap = .1,
      main = "asphalt -- color coded  'RUN'",
      col = 1+ asphalt[, 4])

lassogrp documentation built on July 25, 2021, 3 a.m.