Stata foreach循环从变量名列表中生成新变量

Stata foreach loop to generate new variables from a list of variable names

我想创建一个循环,它创建虚拟变量并从变量名称列表中命名它们,然后在所有变量名称都被迭代一次后停止。

我的尝试:


gen c = 0
foreach x of varlist stchpr01-stchpr11{
        foreach i in teacher_late teacher_absent teacher_skip teacher_bully teacher_harass_teachers teacher_harass_pupils teacher_language teacher_drugs teacher_alcohol teacher_health teacher_conflict{
            while c < 11{
                gen  `i' = 0
                replace `i' = 1 if `x' == 2 | `x' == 3
                replace `i' = 0 if `x' == 1
                replace `i' = . if missing(`x')
                replace c = c+1
            }
        }
}

我感觉到你对

感到困惑
  • Stata 意义上的局部宏和变量(虽然 c 机制是合法的,但局部宏更适合用作计数器,除非你根本不需要一个)

  • generatereplace 因为您正在尝试 generate 已经存在的变量

  • 并行循环,不是嵌套循环

(对我而言)有点不清楚的正是您想要做的。

我想这就是你想要的。

  • 您有 11 个现有变量。

  • 你要11个对应的新变量,如果对应的现有变量是2或3,则每个变量是一个指标1,如果是1,则为0,否则为缺失。

如果是这样,这就是代码草图。注意:这只是一个循环。

local newvars teacher_late teacher_absent teacher_skip teacher_bully teacher_harass_teachers teacher_harass_pupils teacher_language teacher_drugs teacher_alcohol teacher_health teacher_conflict
            
foreach x of varlist stchpr01-stchpr11 {
    gettoken new newvars : newvars 
    gen `new' = cond(`x' == 2 | `x' == 3, 1, cond(`x' == 1, 0, .)) 
} 

另见 https://journals.sagepub.com/doi/pdf/10.1177/1536867X211063415