How do I use a defined subset of items in my covariate list.
The title is pretty much it. I have a list of 5 covariates, and 703 items on the list. Most are expensive so i want to choose only from say items 23-39 and items 267, but i want to bring the list along in the code in-case we have to bite the bullet and augment to more expensive items later on.
Is this doable?
Thanks