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)

There are measurements on 9 looms for each of the six types of warp (AL, AM, AH, BL, BM, BH).

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) # NOT RUN { 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 3.6.1, License: Part of R 3.6.1

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