This merges a one- or two-sided formula f with the
right-hand sides of all formulas supplied in ....
add_predictors(f, ..., fun = "+")A formula.
Formulas whose right-hand sides will be merged to
f.
A function name indicating how to merge the right-hand sides.
f <- lhs ~ rhs
add_predictors(f, ~var1, ~var2)
# Left-hand sides are ignored:
add_predictors(f, lhs1 ~ var1, lhs2 ~ var2)
# fun can also be set to a function like "*":
add_predictors(f, ~var1, ~var2, fun = "*")
Run the code above in your browser using DataLab