I would like to draw an X axis with labels above (or below) ticks
I have succeeded in drawing the axis with point-like ticks with regular
step:
\xymatrix{\ar@{-}[rr] & . & .\ar@{>}[rrrr] & . & . & . & X}
Yet i cannot add labels. Is that possible?
Morover, i would like to add ticks at non regular positions. How to change
spacing between columns?
Thank you
--P