[R] quote a column of a dataframe by its name

[Rolf Turner]

On 10/05/13 05:15, John Kane wrote:
> X[,names(X)[4]]  works fine  for me.  I had never thought of doing this. Neat idea.

Perhaps I am being obtuse, but how would X[,names(X)[4]] differ from X[,4]?

     cheers,

     Rolf Turner