How to fix the superscript in the ticklabels of my boxplot?

Hi, I am generating the attached plot using the code below. I cannot get 'xticklabel' to display the superscript in the label units correctly: instead of making the superscript, it prints m^{-3} on the plot. I assume this has something to do with having curly brackets within another set of curly brackets in the set...xticklabel command but I have not been able to find a workaround. Can someone help?

    ff=figure('name', 'box');
    boxplot(X,groups1, 'positions', positions, 'color',CM, 'symbol', '+');
    l=legend(findobj(gca,'Tag','Box'), ll);
    set(gca,'xtick',length(fileList)/2:   length(positions)/3:    length(positions)-1.5)
    set(gca,'xticklabel',{'density [kgx10 m^{-3} ]', 'Tw [°C]', 'Wind [m s^{-1}]'})
    set(gca, 'Fontsize', 14, 'Fontweight', 'bold');
    pos = get(ff,'position');
    set(ff,'position',[pos(1:2)/4 pos(3:4)*2]);
    title('Comparison of stations')
    grid on

Answer 1

[Mischa Kim]

Lea, this might help. Add

 set(gca,'TickLabelInterpreter', 'tex');

before setting the xticklabel.

[Lea]

Thank you for your quick reply (on a sunday no less!) This worked. So simple but it didn't occur to me because it was previously working without setting the interpreter in other plots.

[Andrew Winter]

Thanks for your reply! It saved me so much time.