Rotate and alternate tick labels on any Xaxis (top or bottom)

Rotate tick labels and alternate them for reading clarity

Rotate tick labels by any degree and alternate them upon and below the X axis for reading clarity, in case of closeby ticks.

Works for top or bottom X axis.

Input: axes handle, rotation in degree, position of the X axis ('top' or 'bottom')

Warning:
1) In case of long tick labels crossing the axis, values u and l in the inputs have to be changed.
2) In case of printing, the option 'middle' instead of 'cap' for the vertical alignment looks better.