Gnuplot: how to only draw xtics without tic lables on top

Question

I want to draw xtics on top but without its tic labels:

This is what I want:

This is the code I tried:

set xtics mirror;
set border 2+4;
plot x;

This gave me:

How can I modify the script to get what I want?

Answer 1

You can remove the tick labels with set format x '', but that still leaves the xtics at the bottom.

In my opinion, the best way is to use only the x2-axis

set ytics nomirror
unset xtics
set x2tics nomirror
set format x2 ''
set border 2+4
plot x axes x2y1