R/interaction.term.split.R

In jrising/hierlm: Hierarchical Linear Models

#' Split an Interaction Term
#'
#' Extract the two pieces of an interaction term
#'
#' @param term An interaction (a:b) term
#' @return Vector of the subterms (c(a, b))
#' @examples
#' interaction.term.split("Petal.Length : Species")

interaction.term.split <- function(term) {
    subterms <- strsplit(term, ":")[[1]]
    gsub("^\\s+|\\s+$", "", subterms)
}