How to change point seperated into comma seperated value with clabel notation?

Hi,

for a publication i want to change the point seperated values into comma seperated values.

I made a figure using contourf (x,y,z). It works fine. Last step would be to change the value notation.

[C,h]=contourf(Xm, Ym, Zm);

clabel(C,h, 'LabelSpacing',4000,'Color', 'black','FontSize', 12, 'FontName', 'Arial');

Is there any solution for solving the problem? Or is there a recommendation for using another code?

Thanks in advance. Felix