从列表中提取子对象

Question

我在R

中有以下列表

> str(Grades.Good)
List of 2
 $ FALSE: Named num [1:10] 89 74 64 61 55 80 78 73 57 87
  ..- attr(*, "names")= chr [1:10] "Bettie" "Dona" "Frances" "Gerri"       ...
 $ TRUE : Named num [1:5] 94 97 94 91 92
  ..- attr(*, "names")= chr [1:5] "Alana" "Consuela" "Elaine" "Kenyatta" ...

我正在尝试从第二项Grades.Good [2]中提取名称。我试过了：

> names(Grades.Good[2])
[1] "TRUE"
> names(Grades.Good)[2]
[1] "TRUE"
> names(Grades.Good$TRUE)
Error: unexpected numeric constant in "names(Grades.Good$TRUE"

使用名称＆＃34; Alana＆＃34;提取字符向量的最佳方法是什么？ ＆＃34; Consuela＆＃34; ＆＃34;伊莱恩＆＃34; ＆＃34;肯雅塔＆＃34; ...？