R/odds.R

In amakhija/odds-2: Functions for Gambling

#' Converts fractional odds to decimal odds.
#'
#' @param fractional A character vector of fractional odds.
#' @return A numeric vector of decimal odds.
#' @examples
#' to.decimal("1/2")
#' @export
to.decimal <- function(fractional) {
  if (class(fractional) != "character") {
    stop("fractional must be string!")
  }
  eval(parse(text = fractional)) + 1
}

to.decimal("1/2")

#' Converts decimal odds to fractional odds.
#'
#' @param decimal A numeric vector of decimal odds.
#' @return A character vector of fractional odds.
#' @examples
#' to.fractional(1.5)
#' @export
to.fractional <- function(decimal) {
  as.character(MASS::fractions(decimal - 1))
}

to.fractional(1.5)