R: create new column with name coming from variable

Question

I have a dataframe with several columns and would like to add a new column and name it according to a previous variable. For example:

df <- data.frame(\"A         


        

Answer 1

Try [ instead of $:

> df[, Variable] <- NA
> df
  A B  C
1 1 a NA
2 2 c NA
3 3 d NA
4 4 b NA