Indicate mean with a bar in Matlab

[Old Guy]

I want to put the following as an axis label on a plot, but I cannot figure out how to get the bar on top in Matlab
$$\bar \xi$$
Thanks.

 

[jhae2.718]

xlabel('$\bar{\xi}$'[/color], 'interpreter'[/color], 'latex'[/color]);

replacing xlabel with whatever label it is.

 

[Old Guy]

Thanks for your help, but I could not get this to work because I am trying to change a .fig file in the property editor. I tried generating the code, and then making the modification there, but I was unable to save as .fig after that. Any suggestions?