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PlotFcns how to display progress in the number of nodes

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Mariam LAFKIHI
Mariam LAFKIHI on 9 Nov 2017
Answered: Alan Weiss on 22 Nov 2017
Hello, I am using the intlinprog function, and I want to plot the progress in terms of number of nodes. But the plot shows me just the final solution with number of nodes equal to zero. How can I plot the progress while the algorithm executes ?
Thank you,
Mariam

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Answers (2)

Krishna Bindumadhavan
Krishna Bindumadhavan on 22 Nov 2017
I think what you are looking for here could be the intlinprog Output function. This allows you to call an output function or plot function at suitable event occurrences during the algorithm. You can take a look at the documentation here: https://www.mathworks.com/help/optim/ug/intlinprog-output-functions-and-plot-functions.html.

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Alan Weiss
Alan Weiss on 22 Nov 2017
If you are using the built-in @optimplotmilp function for making your plot, and it shows no branch-and-bound steps, then intlinprog didn't take any branch-and-bound steps. Look at the iterative display and you'll see that the problem was solved without branch-and-bound, so there are no nodes. Nothing to plot.
Alan Weiss
MATLAB mathematical toolbox documentation

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