多个 coefplots：循环引号问题

Question

我正在尝试在 STata 中创建一个循环来创建 coefplots，它显示总体子组的多重回归系数。每个图都会使用不同的回归量。

我遇到了使用循环引用的问题。理想情况下，每个图表都应该像我所包含的图片一样。

sysuse auto, clear 
replace foreign = 3 if (rep78 == 3) 
regress price mpg length if foreign == 1
estimates store mpg_foreign_1_length
regress price mpg length if foreign == 0
estimates store mpg_foreign_0_length
regress price mpg length if foreign == 3
estimates store mpg_foreign_3_length

regress price mpg trunk if foreign == 1
estimates store mpg_foreign_1_trunk 
regress price mpg trunk if foreign == 0
estimates store mpg_foreign_0_trunk 
regress price mpg trunk if foreign == 3
estimates store mpg_foreign_3_trunk 


global list_graphing "trunk" "length"

foreach x of global list_graphing {
        coefplot "mpg_foreign_3_`x' mpg_foreign_1_`x'" ||, drop(_cons) 
   }
   

  foreach x of global list_graphing {
        coefplot "mpg_foreign_3_`x' mpg_foreign_1_`x' mpg_foreign_0_`x'" ||, drop(_cons)
   }
   
 //invalid something: quotes do not match


   foreach x of global list_graphing {
        coefplot "mpg_foreign_3_`x'" "mpg_foreign_1_`x'" "mpg_foreign_0_`x'" 
   }
  

第一张图基本上显示了我正在尝试创建的内容；但是，当添加第三个变量时它不起作用。我无法用引号将它们分开，因为正如代码清楚所示，这使得系数不再位于同一个图表上。

Answer 1

我对

coefplot

没有太多经验，但如果你不使用引号，这似乎是有效的（事实上，我有点惊讶它有时确实可以使用引号）。

sysuse auto

replace foreign = 3 if (rep78 == 3) 
regress price mpg length if foreign == 1
estimates store mpg_foreign_1_length
regress price mpg length if foreign == 0
estimates store mpg_foreign_0_length
regress price mpg length if foreign == 3
estimates store mpg_foreign_3_length

regress price mpg trunk if foreign == 1
estimates store mpg_foreign_1_trunk 
regress price mpg trunk if foreign == 0
estimates store mpg_foreign_0_trunk 
regress price mpg trunk if foreign == 3
estimates store mpg_foreign_3_trunk 


global list_graphing trunk length

foreach x of global list_graphing {
        coefplot mpg_foreign_3_`x' mpg_foreign_1_`x' ||, drop(_cons) 
   }
   

  foreach x of global list_graphing {
        coefplot mpg_foreign_3_`x' mpg_foreign_1_`x' mpg_foreign_0_`x' ||, drop(_cons)
   }
   

   foreach x of global list_graphing {
        coefplot mpg_foreign_3_`x' mpg_foreign_1_`x' mpg_foreign_0_`x' 
   }

Answer 2

问题出在你的定义上

global list_graphing "trunk" "length"

Stata 删除最外面的引号作为分隔符，并且您的宏保持不变

trunk" "length 

这会导致下游出现问题。如果您需要在全局宏内有匹配的引号，那么您的定义应该是

global list_graphing `" "trunk" "length" "' 

但正如已经回答的那样，这里不需要任何引号。