How can I create a plot during an Optimization using Output Function?

Question

HerrVader 2015-7-22

0
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https://ww2.mathworks.cn/matlabcentral/answers/230756-how-can-i-create-a-plot-during-an-optimization-using-output-function

回答： Mike Garrity 2015-7-22

I tried plot some Points of my Optimization (I used gamultiobj) using an Output Function. But all Figures appear only when the optimization has finished or I quit the Programm using "ctrl +c".

I use the following OutputFcn:

function [st, opt,optchange] = gamOutput( optionsin,statein,flag)
disp(statein.Score)
disp(statein.Population)
figure
plot(statein.Score(:,1),statein.Population(:,1))
st = statein;
opt = [];
optchange = 0;
end

I know that the function is called because the score and the population are diplayed in the command Window during the Optimization. I just don't know, why the figures are all created at the end of the Optimization.