robCompositions (version 2.0.0)

machineOperators: machine operators

Description

Compositions of eight-hour shifts of 27 machine operators

Usage

data(machineOperators)

Format

A data frame with 27 observations on the following 4 variables.

Details

• hqproduction high-quality production
• lqproduction low-quality production
• setting machine settings
• repair machine repair

The data set from Aitchison (1986), p. 382, contains compositions of eight-hour shifts of 27 machine operators. The parts represent proportions of shifts in each activity: high-quality production, low-quality production, machine setting and machine repair.

References

Aitchison, J. (1986) The Statistical Analysis of Compositional Data Monographs on Statistics and Applied Probability. Chapman \& Hall Ltd., London (UK). 416p.

Examples

data(machineOperators)
str(machineOperators)
summary(machineOperators)
rowSums(machineOperators)