Xu' R2 (Omega-squared)

Calculates Xu' Omega-squared value, a simple R2 equivalent for linear mixed models.

Usage

r2_xu(model)

Arguments

model

A linear (mixed) model.

Value

The R2 value.

Details

r2_xu() is a crude measure for the explained variance from linear (mixed) effects models, which is originally denoted as Ω².

References

Xu, R. (2003). Measuring explained variation in linear mixed effects models. Statistics in Medicine, 22(22), 3527–3541. doi:10.1002/sim.1572

Examples

model <- lm(Sepal.Length ~ Petal.Length + Species, data = iris)
r2_xu(model)
#>   Xu's R2 
#> 0.8367238