asbestos {CAvariants}

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

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

data(asbestos)

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

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)