MATLAB: I dont see an error

error display num2str

I dont see an error, but there is one?

display([' Nif = 'num2str(Nif,'% 10.2f') ' [-]']);

I would strongly suggest you learn to use commas.

display([' Nif = ',num2str(Nif,'% 10.2f'),' [-]'])

They make your code more readable. They also make your code work.

Hi, Don't use space between num2str and '('. This will work:

disp (['Iteration ' num2str(it) ': Best cost = ' num2str(Bestcosts(it))]);