Extract Predictor Names from Formula or Terms
all.vars returns all variables used in a formula. This
function only returns the variables explicitly used on the
right-hand side (i.e., it will not resolve dots unless the
object is terms with a data set specified).
form_pred(object, ...)
object |
A model formula or |
... |
Arguments to pass to |
A character vector of names
form_pred(y ~ x + z) form_pred(terms(y ~ x + z)) form_pred(y ~ x + log(z)) form_pred(log(y) ~ x + z) form_pred(y1 + y2 ~ x + z) form_pred(log(y1) + y2 ~ x + z) # will fail: # form_pred(y ~ .) form_pred(terms(mpg ~ (.)^2, data = mtcars)) form_pred(terms( ~ (.)^2, data = mtcars))
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