#-----------------------------------------------------------------
# Project : DBNorm
#-----------------------------------------------------------------
#' Loading build-in datasets
#'
#' This function loads build-in data array for examples
#'
#' @author Qinxue Meng
#' @param n n-th data array to load;
#' if n = 1, DArray1 is loaded;
#' if n = 2, DArray2 is loaded;
#' if n = 3, DArray3 is loaded;
#' if n = 4, DArray4 is loaded;
#' if n is not 1, 2, 3, 4, all four data arrays are loaded.
#' @return None
#' @details
#' This function loads example data arrays for user to test
#' @seealso \code{data()}
#' @export
#' @examples
#' # load DArray1
#' loadData(1)
#' # load all data arrays
#' loadData(5)
loadData <- function(n){
if (n == 1){
data(DArray1)
} else if (n == 2) {
data(DArray2)
} else if (n == 3) {
data(DArray3)
} else if (n == 4) {
data(DArray4)
} else {
data(DArray1)
data(DArray2)
data(DArray3)
data(DArray4)
}
}
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