vcdExtra (version 0.8-5)

Mental: Mental Impairment and Parents SES

Description

A 6 x 4 contingency table representing the cross-classification of mental health status (mental) of 1660 young New York residents by their parents' socioeconomic status (ses).

Usage

data(Mental)

Format

A data frame frequency table with 24 observations on the following 3 variables.

ses

an ordered factor with levels 1 < 2 < 3 < 4 < 5 < 6

mental

an ordered factor with levels Well < Mild < Moderate < Impaired

Freq

cell frequency: a numeric vector

Details

Both ses and mental can be treated as ordered factors or integer scores. For ses, 1="High" and 6="Low".

References

Friendly, M. Visualizing Categorical Data, Cary, NC: SAS Institute, 2000, Appendix B.7.

Examples

data(Mental)
str(Mental)
(Mental.tab <- xtabs(Freq ~ ses + mental, data=Mental))

# mosaic and sieve plots
mosaic(Mental.tab, gp=shading_Friendly)
sieve(Mental.tab, gp=shading_Friendly)

if(require(ca)){
  plot(ca(Mental.tab), main="Mental impairment & SES")
}