A few issues seem to have arisen in the development of the tm object, including interaction terms and groups. Grouping variables are probably the best way to handle this, along with some modification in how interaction terms are handled.
[x] add grouping ability to tm creation
[x] create modification to pattern expansion of formulas to handle grouped requests
[x] allow for interaction terms to stay together in a group
A few issues seem to have arisen in the development of the
tmobject, including interaction terms and groups. Grouping variables are probably the best way to handle this, along with some modification in how interaction terms are handled.tmcreation