Finding the turning points
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Hi i want to ask about something, i want to solve and locate the turning points (maximum and minimum point) of a graph using matlab gui but i dont know how to code it. The function is user defined and here is my code:
funcString = get(handles.edit1,'String');
funcHandle = str2func(['@(x)' funcString]);
x = linspace(10,-10,100);
y = funcHandle(x);
plot(handles.axes1,x,y);
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Answers (1)
John D'Errico
on 1 May 2023
If all you will use are the 100 coarsely sampled points you are plotting, then min and max will do what you want. Look at the second arguments returned from min and max. You could also use findpeaks.
If you are willing to use the function itself, then you might use fminbnd. Note that fminbnd always searches fro a minimum. But you could then search for the minimum of -f(x), which would be the maximum of f.
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