MATLAB: How to print fval and optimised values at each iteration

fminsearch outputfunction

Hi I have a very simple task: printing fval and x values of each iteration. I already printed x values of each iteration, as mentioned in Outputfunction. However I have no luck printing fval of each iteration.

Best Answer

Use the optimvalues structure to get fval, as described here

http://www.mathworks.com/help/matlab/math/output-functions.html#bsgpq6q-37

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MATLAB: Fminunc: get Hessian approximation after each iteration

You could try running fminunc 1 iteration at a time in a for-loop and saving the 6th output arguments,


  options.MaxIter=1;
  for i=1:N
     
   [x,~,~,~,~,hessian{i}] = fminunc(fun,x,options);
  end

MATLAB: How to pass more parameters than the existing ones to output function of fmincon

To pass external parameters, use the documented ways. You can also use persistent variables within an output function.

Alan Weiss

MATLAB mathematical toolbox documentation

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MATLAB: Fminunc: get Hessian approximation after each iteration

MATLAB: How to pass more parameters than the existing ones to output function of fmincon

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