heplots: Plastic – R documentation

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Plastic

Plastic Film Data

Description

An experiment was conducted to determine the optimum conditions for extruding plastic film. Three responses were measured in relation to two factors, rate of extrusion and amount of an additive.

Usage

data(Plastic)

Format

A data frame with 20 observations on the following 5 variables.

tear: a numeric vector: tear resistance
gloss: a numeric vector: film gloss
opacity: a numeric vector: film opacity
rate: a factor representing change in the rate of extrusion with levels Low (-10%), High (10%)
additive: a factor with levels Low (1.0%), High (1.5%)

Source

Johnson, R.A. & Wichern, D.W. (1992). Applied Multivariate Statistical Analysis, 3rd ed., Prentice-Hall. Example 6.12 (p. 266).

References

Krzanowski, W. J. (1988). Principles of Multivariate Analysis. A User's Perspective. Oxford. (p. 381)

Examples

str(Plastic)
plastic.mod <- lm(cbind(tear, gloss, opacity) ~ rate*additive, data=Plastic)
Anova(plastic.mod)

pairs(plastic.mod)

heplots

Visualizing Hypothesis Tests in Multivariate Linear Models

v1.3-8

GPL (>= 2)

Authors

John Fox [aut], Michael Friendly [aut, cre], Georges Monette [ctb], Phil Chalmers [ctb]

Initial release

2021-01-20