Create Custom Plot Function For GA matlab
function state = gaplotchange(options, state, flag)
% GAPLOTCHANGE Plots the logarithmic change in the best score from the
% previous generation.
%
persistent last_best % Best score in the previous generation
if(strcmp(flag,'init')) % Set up the plot
xlim([1,options.MaxGenerations]);
axx = gca;
axx.YScale = 'log';
hold on;
xlabel Generation
title('Log Absolute Change in Best Fitness Value')
end
best = min(state.Score); % Best score in the current generation
if state.Generation == 0 % Set last_best to best.
last_best = best;
else
change = last_best - best; % Change in best score
last_best = best;
if change > 0 % Plot only when the fitness improves
plot(state.Generation,change,'xr');
end
end