Add predictors to a formula
This merges a one- or two-sided formula f with the
right-hand sides of all formulas supplied in ....
add_predictors(f, ..., fun = "+")
f |
A formula. |
... |
Formulas whose right-hand sides will be merged to
|
fun |
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 = "*")
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