#' Data prep freq para grafica grid
#'
#' @param data
#' @param ipn
#' @param prob
#'
#' @return
#' @export
#'
#' @examples
prep_freq <- function(data, ipn, prob) {
df <- prep(data, ipn, prob)
df_freq <-reshape2::dcast(df, grupo2 ~ grupo1,
value.var = "freq") %>%
bind_rows(summarise_all(., funs(if(is.numeric(.)) sum(.) else "Total"))) %>%
mutate(cTotal = rowSums(.[-1]))
return(df_freq)
}
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