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Calculates the Somers' Dxy rank correlation for logistic regression models.

Usage

r2_somers(model)

Arguments

model

A logistic regression model.

Value

A named vector with the R2 value.

References

Somers, R. H. (1962). A new asymmetric measure of association for ordinal variables. American Sociological Review. 27 (6).

Examples

if (FALSE) {
if (require("correlation")) {
  model <- glm(vs ~ wt + mpg, data = mtcars, family = "binomial")
  r2_somers(model)
}
}