add rep_n() and rep_character() to rep each inner elements in vectors
add Apriori.Basket() to create basket format data for apriori analysis
add as.data.frame() to transform rules to dataframe for apriori analysis
version 1.4
date: 2020-07-27
add numeric.nms(), factor.nms(), character.nms(), and name.n() to get numeric names, factor names, character names and names with unique number values n.