gkwreg (version 2.1.6)

formula.gkwreg: Extract Formula from GKw Regression Model

Description

Extracts the model formula from a fitted Generalized Kumaraswamy regression model object. Properly handles formulas with up to 5 parts.

Usage

# S3 method for gkwreg
formula(x, ...)

Value

The formula used to fit the model. For multi-part formulas, returns an object of class "Formula".

Arguments

x

An object of class "gkwreg".

...

Currently not used.

Author

Lopes, J. E.

See Also

gkwreg, update.gkwreg

Examples

# \donttest{
data(GasolineYield)

# Simple formula
fit1 <- gkwreg(yield ~ batch + temp, data = GasolineYield, family = "kw")
formula(fit1)

# Two-part formula
fit2 <- gkwreg(yield ~ temp | batch, data = GasolineYield, family = "kw")
formula(fit2)

# Five-part formula
fit3 <- gkwreg(yield ~ temp | batch | temp | 1 | 1,
  data = GasolineYield, family = "gkw"
)
formula(fit3)
# }