asOneFormula(..., omit)
...
| 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"). |
...
are converted into a single linear
formula, with the variables names separated by +
....
, except the ones listed in
omit
.formula
, all.vars
library(lme) asOneFormula(y ~ x + z | g, list(~ w, ~ t * sin(2 * pi)))