plotting column greater than 10

I am trying to plot a column greater than 10, but I get an error when I use {}.. l开发者_JS百科ike in regular bash. How do I tell gnuplot to do this?

plot '../data.txt' using (${11}:$2)

Give these two possibilities a try:

1. plot '../data.txt' using 11:2
2. plot '../data.txt' using ($11):($2)