asbestos: Selikoff's data, a two-way contingency table.

Description Usage Format References Examples

Description

The data set consists of 4 rows and 5 columns. The rows represent the degree of severity of asbestosis and the columns are concerned with the time of exposure to asbestos in years of the workers

Usage

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Format

The format is:
row names [1:4] "None" "grade1" "grade2" "grade3"
col names [1:5] "0-9" "10-19" "20-29" "30-39" "40+"

References

Beh EJ and Lombardo R 2014 Correspondence Analysis: Theory, Practice and New Strategies. Wiley.
Selikoff IJ 1981 Household risks with inorganic fibers. Bulletin of the New York Academy of Medicine, 57, 947 – 961.

Examples

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asbestos <-structure(c(310, 36, 0, 0, 212, 158, 9, 0, 21, 35, 17, 4, 25, 
102, 49, 18, 7, 35, 51, 28), .Dim = 4:5, .Dimnames = list(c("none", 
"grade1", "grade2", "grade3"), c("0-9", "10-19", "20-29", "30-39", 
"40+")))
dim(asbestos)
dimnames(asbestos) 

CAvariants documentation built on Jan. 14, 2019, 5:04 p.m.