Analogous to other splitting functions, but retains necessary attributes across the split object. As of now, it can only be unsplit with bdots::rbindlist
# S3 method for bdotsObj
split(x, f, drop = FALSE, by, ...)
Object of class bdotsObj
For consistency with generic, but is not used
logical. Default FALSE will not drop empty list elements caused by factor levels not referred by that factor. Analagous to data.table::split
Character vector of column names on which to split. Usually will be Subject or one of the fitted groups
not used