num2str in legend

I want to use num2str in title of a plot:

the problem is i need to make 8 in term wo_f8 dynamic as well as using num2str.(e.g I need to have wo_f20 in another run)

how can I do that?

any help is appreciated.

title({'f=' num2str(wo_f8)})

[jonas]

You already made a mistake either importing or creating those variables. Go back and use a cell array or struct to store your data.

[David Goodmanson]

Hello H-M

The most viable and useful solution is to not use dynamic variables in the first place. If you create wo_f as a vector with components, then you will be able to use wo_f(8), wo_f(20) etc, and, for example, wo_f(k) for the kth plot if that is what is wanted. It might take some work to go back and redefine the dynamic variables, but it's time well spent because of how convenient it make things later on.

[Stephen23]

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Earlier question: https://www.mathworks.com/matlabcentral/answers/583238-how-to-create-num2str-in-a-variable

[Adam Danz]

"the problem is i need to make 8 in term wo_f8 dynamic"

The goal isn't clear to me. The title of your question references legends and then the quesitons references titles. If wo_f8, wo_f9, wo_f10, ... wo_f20 are variables you created then the advice given above is what I would also recommend. If you didn't create these variables (i.e. you're loading them into Matlab), you could organize the data into a cell array or structure and then loop through the elements.

c = {wo_f8, wo_f9, wo_f10, . . ., wo_f20 }; % or matrix if the values are scalar
for i = 1:numel(c)
    title(axisHandles(i), {'f=', num2str(c{i})});
end