Hi,
As far as I am aware, the model.matrix function does not return
perfect metadata on what each column of the model matrix "means".
The columns are named (e.g. age:genderM), but encoding the metadata as
strings can result in ambiguity. For example, the dummy variables
created when the factors v
Hi,
I've noticed something strange when using the terms {stats} function.
R documentation describes the factors attribute of the terms.object as follows:
A matrix of variables by terms showing which variables appear in which terms.
The entries are 0 if the variable does not occur in the term, 1
