How can one write a program to do this? (fminbnd)

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I define a function
function out = test(x)
y=x^2;
z=y+1;
out=z
end
Then I run
fminbnd(@(x) test(x),0,1)
This will return the value of x that maxes test(x). But I also want to output y at that optimal. How can one do this?

Accepted Answer

Alan Weiss
Alan Weiss on 5 Aug 2020
Edited: Alan Weiss on 5 Aug 2020
You can get the value of out = z simply by asking for it:
[xbest,out] = fminbnd(@(x) test(x),0,1)
Alan Weiss
MATLAB mathematical toolbox documentation
  4 Comments
Steven Lord
Steven Lord on 5 Aug 2020
Define your test function to return two outputs, out and y. fminbnd will only ever call your function with one output. After fminbnd returns the "best x" call test with that best x as the input and two outputs.

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