#' Count the number of interactions
#'
#' Find the number of interactions occuring between two players in an interData
#' object
#' @param p1 a player in the interData object
#' @param p2 a player in the interData object
#' @param intData an object of the class "interData" with players p1 and p2
#' @param includeDraws logical indicating wether to include draws or not
#' @param showInteractions logical indicating wether to return a data frame
#' showing the interactions. Defaults to showing the number of interactions.
#' @return Either the number of interactions between p1 and p2 in intData or a
#' dataframe displaying those interactions
#' @examples
#' # generate generic data
#' interactions <- data.frame (a = sample (letters [1:10], 100, T),
#' b = sample (letters [1:10], 100, T),
#' o = sample (c(-1,-1,0,1,1), 100, T),
#' d = Sys.time () + runif (100, 40, 160))
#' # convert to interData object
#' id1 <- intTableConv (interactions)
#' # calculate using all players
#' numInt (id1$players [1], id1$players [2], id1)
#' @export
numInt <- function (p1, p2, intData, includeDraws = F, showInteractions = F){
idError (intData); plyrError (c(p1, p2), intData)
ints <- subset (intData, players = c(p1, p2))$interactions
if (includeDraws){
if (showInteractions) {return (ints)}
else {return (nrow (ints))}
}
else if (!includeDraws){
if (showInteractions) {return (ints [ints$outcome != 0,])}
else {return (nrow (ints [ints$outcome != 0,]))}
}
}
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