ethanol: Ethanol data

In JOPS: Practical Smoothing with P-Splines

Ethanol data

Description

The ethanol data frame contains 88 sets of measurements for variables from an experiment in which ethanol was burned in a single cylinder automobile test engine.

This data set was part of the package SemiPar, which is no longer available at CRAN in compiled form. Copied to JOPS with slight modifications of the documentation.

Usage

data(ethanol)

Format

This data frame contains the following columns:

NOx

the concentration of nitric oxide (NO) and nitrogen dioxide (NO2) in engine exhaust, normalized by the work done by the engine.

C

the compression ratio of the engine

E

the equivalence ratio at which the engine was run – a measure of the richness of the air/ethanol mix.

Source

Brinkman, N.D. (1981). Ethanol fuel – a single-cylinder engine study of efficiency and exhaust emissions. SAE transactions Vol. 90, No 810345, 1410–1424.

References

Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
Semiparametric Regression Cambridge University Press.
https://drcarroll.wpengine.com/semiregbook/

Examples

library(JOPS)
data(ethanol)
pairs(ethanol)

JOPS documentation built on June 8, 2025, 11:10 a.m.