File: getUsedFactorLevels.R

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r-cran-bbmisc 1.13.1-1
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#' @title Determines used factor levels
#'
#' @description
#' Determines the factor levels of a factor type vector
#' that are actually occuring in it.
#'
#' @param x [\code{factor}]\cr
#'   The factor.
#' @return [\code{character}]
#' @export
getUsedFactorLevels = function(x) {
  intersect(levels(x), unique(x))
}