MATLAB: Can fzero be used to find the minimum

fplotfzero

Can fzero command be used to find the minimum of a function or a curve ? as in if i want to plot a function over a period and also want to find the minimum, is fzero command the best option and if so, how do i use it to find the minimum ?

Best Answer

Do you have the optimization toolbox?
To start you can begin with the fminbnd function. For example, say your function is g(x) = -x^2*exp(-x) for 0<x<10. You can find the minimum of the function on the specified interval using the commands
% define a function handle
g = @(x) -x.^2.*exp(-x); 
% find minimum on specified interval
[xMin,fVal] = fminbnd(g,0,10);
% visualize
t = linspace(0,10);
plot(t,g(t),xMin,fVal,'ro')
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