R330 (version 1.0)

cycles.df: Cycles to failure of worsted yarn

Description

Data which looked at the number of cycles to failure of lengths of worsted yarm under cycles of repeated loading

Usage

data(cycles.df)

Format

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

yarn.length

factor which takes lengths 250, 300 or 350mm, which were classified as low, med or high respectively

amplitude

the cycle amplitudes were taken to be 8, 9 or 10mm, which were classified as low, med or high respectively

load

loads taken to be 40, 45 or 50 grams, which were classified as low, med or high respectively

cycles

number of cycles to failure

Source

Cox and Snell, Applied Statistics: Principles and Examples, pp 98-102

References

Cox, D. R. & Snell, E. J. (1981). Applied Statistics: Principles and Examples. Chapman and Hall, London.

Examples

data(cycles.df)
library(lattice)
dotplot(cycles~yarn.length|amplitude*load,xlab="Yarn length",
 ylab="Cycles to failure",data=cycles.df,
strip=function(...)strip.default(...,strip.names=TRUE))