R: Mental impariment and parents SES

Mental {vcdExtra} | R Documentation

## Mental impariment 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".

### Source

Haberman, S. J. The Analysis of Qualitative Data: New Developments, Academic Press, 1979, Vol. II, p. 375.

Srole, L.; Langner, T. S.; Michael, S. T.; Kirkpatrick, P.; Opler, M. K. & Rennie, T. A. C. Mental Health in the Metropolis: The Midtown Manhattan Study, NYU Press, 1978, p. 289

### 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)

    library(ca)
    plot(ca(Mental.tab), main="Mental impairment & SES")
    title(xlab="Dim 1", ylab="Dim 2")

[Package vcdExtra version 0.7-1 Index]