在R函数中使用变量名代替列名

Question

In this: 在此：

y <- svytable(~date4a, design = Pew.w)

date4a is a column name. date4a是列名。

I want to replace date4a with a variable. 我想用一个变量替换date4a 。 The variable of course, will refer to a column name. 当然，该变量将引用列名。

Eg something like: 例如：

col <- "date4a"

y <- svytable(~col, design = Pew.w)   #This doesnt' work

How may I do that? 我该怎么办？

Answer 1

Under the assumption that this is something that is really worth doing, you could try: 假设这确实是值得做的，则可以尝试：

col <- my.data.frame$date4a
y   <- svytable(~col, design=Pew.w)