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#' @title Nth values
#' @description Returns the Nth highest or lowest values in a vector
#'
#' @param x Numeric vector
#' @param N Number of (Nth) values returned
#' @param smallest (FALSE/TRUE) Return the highest, else smallest values
#'
#' @details
#' This function returns n lowest or highest elements in a vector
#'
#' @return Numeric vector of Nth values
#'
#' @author Jeffrey S. Evans <jeffrey_evans@@tnc.org>
#'
#' @examples
#' nth.values(1:20, N=3, smallest = TRUE)
#' nth.values(1:20, N=3)
#'
#' @export nth.values
nth.values <- function(x, N=2, smallest = FALSE) {
if(!is.numeric(x))
stop("x must be a numeric vector")
if(N >= length(x))
stop("N cannot be larger than length-1 of the vector")
if(smallest) {
x[order(x)[1:N]]
} else {
sort(x[order(x, decreasing = T)[1:N]])
}
}
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