#' Friendship choices among pupils
#'
#' This data was collected by Jacob L. Moreno and Helen Jennings in 19XX... Each pupils were asked "Who wants to be sitting next to whom?"
#' Each child could choose two others...
#'
#' @format A list of square directed matrices
#'
#' @source Moreno, Jacob L. (1934). Who Shall Survive? Washington, DC: Nervous and Mental Disease Publishing Company.
#'
#' @usage data(pupils_classroom)
#' \describe{
#' \item{friendship_1th}{1st Grade}
#' \item{friendship_2th}{2nd Grade}
#' \item{friendship_3th}{3rd Grade}
#' \item{friendship_4th}{4th Grade}
#' \item{friendship_5th}{5th Grade}
#' \item{friendship_6th}{6th Grade}
#' \item{friendship_7th}{7th Grade}
#' \item{friendship_8th}{8th Grade}
#' }
#'
#'
#' @docType data
#'
#'
"pupils_classroom"
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