MATLAB: Hi, what does ~ mean in the following code

special characters

 [t02,~] = ode23(@(t,x)system.deriv(t,x,0, xd, @(t)lookup_u(zdot,t)), [0 2], init.fun(xd),opt);

Best Answer

It means to ignore that output. Don't take the second output and assign it to any variable - just ignore it completely, throw it away. You could also just do
t02 = ode23(.............
Since the ignored output is the later one. You can't do that if you want to ignore the first one and keep the second one though.
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