MATLAB: Num2str with latex

MATLABplotstringvariable

Hi, so I have this label which works fine. However, I've created a function in which the exponent varies (1/4). Therefore, I put a variable m in there and used num2str but the label doesn't come up right….
How could I apply num2str in the exponent for this case?
xlabel('$\it{\bf{(f_{ohm}P)^{1/4}}}$','Interpreter','Latex','FontSize', 15 )

Best Answer

You can use rats function to get what you need actually.
Try this below: 
m = 1/4;
a = ['$\it{\bf{(f_{ohm}P)^{',rats(m), '}}}$'];
xlabel(a,'Interpreter','Latex','FontSize', 15 );
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