MATLAB: Multiobjective optimization – Creating new plot function

Question

Hello,

I want to plot averages of my two optimization objective by generations. (assuming running it by using command line)

By the help file, the plot function is defined as:

function stop = plotfun(options,state,flag)

options — I put here 'options' as defined earlier.

state — should I put here 'optimresults' ?

flag — by definition "String that tells what stage the algorithm is currently in." From where exactly should I take this string?

With regards.

Answer 1

I think you have a misconception that can be quickly cleared up. Take a look at the documentation of custom plot functions.

The misconception is that MATLAB fills in options, state, and flag. You are free to read and use those values, but you do not have to.

The syntax is, in fact,

 function state = plotfun(options,state,flag)

If you want the plot function to stop the solver, follow this prescription: set state.StopFlag to a nonempty string.

Good luck,

Alan Weiss

MATLAB mathematical toolbox documentation