s20x (version 3.1-40)

crosstabs: Crosstabulation of two variables

Description

Produces a 2-way table of counts and the corresponding chi-square test of independence or homogeneity.

Usage

crosstabs(formula, data)

Value

An invisible list containing the following components:

row.props

a matrix of row proportions, i.e. cell counts divided by row marginals.

col.props

a matrix of column proportions, i.e. cell counts divided by column marginals.

Totals

a matrix containing the cell counts and the marginal totals.

Arguments

formula

a symbolic description of the model to be fit: ~ fac1 + fac2; where fac1 and fac2 are vectors to be crosstabulated and treated internally as factors.

data

an optional data frame containing the variables in the model.

Examples

##body image data:
data(body.df)
crosstabs(~ ethnicity + married, body.df)