cramer {treeClust}

Compute Cramer's V for a two-way table

Description

This function computes the value of Cramer's V for a two-way table.

Usage

cramer(tbl)

Arguments

tbl

Two-way table, or matrix, of counts.

Details

If X^2 is the usual chi-squared measure of association in a two-way table, Cramer's V is sqrt (X^2 / (n * (k-1))), where n is the total number of observations in the table, and k is min (nrow(table), ncol(table)).

Value

Numeric value of Cramer's V, with name "X-squared".

Author(s)

Sam Buttrey

References

Agresti, "Categorical Data Analysis," p. 75, where V^2 is used.