如何使用2個類別變量和1個數字變量的信息創建新變量 [英]How to create new variables with information from 2 categorical and 1 numeric variable
描述性表-如何創建同時包含數字變量和分類變量的表 [英]Descriptive tables - how to create a table containing both numeric and categorical variables
如何計算 R 中數值變量和分類變量的描述性統計量? [英]How to calculates the descriptive statistics for both numeric and categorical variables in R?