#' Sample multiplexed dataset for `mxnorm`.
#'
#' A simulated multiplexed dataset containing:
#' 4 slides, with 3 images each, and 3 markers, and 1 metadata column.
#'
#' @format A data frame with 3000 rows and 6 variables:
#' \describe{
#'   \item{slide_id}{slide identifier}
#'   \item{image_id}{image identifier}
#'   \item{marker1_vals}{simulated marker 1 values}
#'   \item{marker2_vals}{simulated marker 2 values}
#'   \item{marker3_vals}{simulated marker 3 values}
#'   \item{metadata1_vals}{simulated metadata 1 values}
#'   ...
#' }
#'
"mx_sample"