lathe1: Lathe data

In alr4: Data to Accompany Applied Linear Regression 4th Edition

Description

These data are the results of an experiment to study the performance of cutting-tool material in cutting steel on a lathe. The two factors are revolution speed and feed rate. The response is tool life in minutes.

Format

This data frame contains the following columns:

Feed

Coded feed rate, coded as (actual feed rate -13)/6. Feed is in thousandths of an inch per revolution.

Speed

Coded speed, coded as (actual speed -900)/300. Speed is in feet per minute.

Life

Life of tool until failure, minutes

Source

M. R. Delozier

References

Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.

Examples

head(lathe1)

Example output

Loading required package: car
Loading required package: carData
Loading required package: effects
Registered S3 methods overwritten by 'lme4':
  method                          from
  cooks.distance.influence.merMod car 
  influence.merMod                car 
  dfbeta.influence.merMod         car 
  dfbetas.influence.merMod        car 
lattice theme set by effectsTheme()
See ?effectsTheme for details.
  Feed Speed Life
1   -1    -1 54.5
2   -1    -1 66.0
3    1    -1 11.8
4    1    -1 14.0
5   -1     1  5.2
6   -1     1  3.0

alr4 documentation built on May 2, 2019, 2:13 p.m.