Combine Formulas of a Set of Objects

The names of all variables used in the formulas extracted from the objects defined in ... are converted into a single linear formula, with the variables names separated by +.

asOneFormula(..., omit)

Arguments

...

objects, or lists of objects, from which a formula can be extracted.

omit

an optional character vector with the names of variables to be omitted from the returned formula. Defaults to c(".", "pi").

Value

a one-sided linear formula with all variables named in the formulas extracted from the objects in ..., except the ones listed in omit.

Author

José Pinheiro and Douglas Bates bates@stat.wisc.edu

See also

formula, all.vars

Examples

asOneFormula(y ~ x + z | g, list(~ w, ~ t * sin(2 * pi)))
#> ~y + x + z + g + w + t