MATLAB Answers

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

1 view (last 30 days)
alpedhuez
alpedhuez on 5 Aug 2020
Commented: alpedhuez on 5 Aug 2020
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?

  0 Comments

Sign in to comment.

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

Show 1 older comment
Alan Weiss
Alan Weiss on 5 Aug 2020
I am not sure what you want. You can calculate y separately in a function. Your function does not output y.
Alan Weiss
MATLAB mathematical toolbox documentation
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.

Sign in to comment.

More Answers (0)

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!