如何使用2个类别变量和1个数字变量的信息创建新变量 [英]How to create new variables with information from 2 categorical and 1 numeric variable
描述性表-如何创建同时包含数字变量和分类变量的表 [英]Descriptive tables - how to create a table containing both numeric and categorical variables
如何计算 R 中数值变量和分类变量的描述性统计量? [英]How to calculates the descriptive statistics for both numeric and categorical variables in R?