R/unique_columns.R

In isabellabingaman/UniquerIGB: Find Unique Rows and Columns

#' Unique Columns
#'
#' This function finds how many unique values each column has in a dataframe.
#'
#' There are many important details within this function, but the most important is that you enter a data frame as the only argument.
#'
#' @author Isabella Bingaman
#'
#' @param df A data frame.
#'
#' @return The number of unique values in each column of df.
#'
#' @examples
#' unique_columns(mtcars)
#'
#' @export

unique_columns <- function(df){
  lengths(lapply(df, unique))
}