warpbreaks

The Number of Breaks in Yarn during Weaving

This data set gives the number of warp breaks per loom, where a loom corresponds to a fixed length of yarn.

Keywords
datasets
Usage
warpbreaks
Format

A data frame with 54 observations on 3 variables.

[,1] breaks numeric
The number of breaks [,2] wool
factor The type of wool (A or B) [,1]
There are measurements on 9 looms for each of the six types of warp (AL, AM, AH, BL, BM, BH).

Source

Tippett, L. H. C. (1950) Technological Applications of Statistics. Wiley. Page 106.

References

Tukey, J. W. (1977) Exploratory Data Analysis. Addison-Wesley.

McNeil, D. R. (1977) Interactive Data Analysis. Wiley.

See Also

xtabs for ways to display these data as a table.

Aliases
  • warpbreaks
Examples
library(datasets) require(stats); require(graphics) summary(warpbreaks) opar <- par(mfrow = c(1, 2), oma = c(0, 0, 1.1, 0)) plot(breaks ~ tension, data = warpbreaks, col = "lightgray", varwidth = TRUE, subset = wool == "A", main = "Wool A") plot(breaks ~ tension, data = warpbreaks, col = "lightgray", varwidth = TRUE, subset = wool == "B", main = "Wool B") mtext("warpbreaks data", side = 3, outer = TRUE) par(opar) summary(fm1 <- lm(breaks ~ wool*tension, data = warpbreaks)) anova(fm1)
Documentation reproduced from package datasets, version 3.1.2, License: Part of R 3.1.2

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