A term here is a predictor from a linear model (e.g. "weight" or "weight:height") whereas a variable is a column in a data frame (e.g. "weight" or "height").
df_term(term, data)df_variable(variable, data)
The degrees of freedom used by the term or variable in the model (as an integer).
The term or variable to get the degrees of freedom for. It should match one
of the column names in data
, or, if it is an interactive term (e.g. "weight:height"), all
components must be column names in data
.
The data the term is from.