plotxaxis

Adds a light grey x-axis to the plot, behind the data

Adds a light grey x-axis to the plot, behind the data

plotxaxis adds an x-axis to the current axes

plotxaxis(AX) adds an x-axis to the axes defined by the handle AX

NOTE: plotxaxis should be called at the end of the plotting commands, or
at least after the x-limits of the axes have been specified.
Please leave a comment if you experience any issues/bugs or if you have any suggestions for improvements.

Enjoy!