TxVis: Visualizations for treatment sequence data

#' Dummy treatment dataset.
#' 
#' A dataset containing 3997 individual treatment levels for 1391 individual
#' patients to a maximum of 7 treatments per individual.
#' 
#' @format A \code{data.frame} with 3997 rows and 7 columns.
#' \describe{
#'   \item{patient}{}
#'   \item{treatment}{}
#'   \item{class}{}
#'   \item{dose}{}
#'   \item{sequence}{}
#'   \item{start}{}
#'   \item{end}{}
#' }
"treat"