0 个投票

Dear scholars,
I have 1 question. 1 need to do 45 iteration. at iteration = 40, the value of RMSE suddenly overshoot. I want to end current loop (exploration stage) and go another loop (exploitation stage) doing another method until the iteration is finish. can someone help me to do this loop.

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darova
darova 2020-4-26
You need to use two loops, Something like
while i < 45
i = i + 1;
% code
if rapid_change
%restart exploration
end
end
Munira
Munira 2020-4-26
for iter=1:50
do %optimization code using ANN
% got the optimal point
%computer RMSE
end
if (iter > 20)
increase= RMSE_all (iter)-RMSE_all(iter-1)
percentage_increase=(increase./RMSE_all(iter-1)).*100
Percent(iter,:)=percentage_increase;
if (percentage_increase> 50)%if the percentage more than 50%
%the previous row was larger than the current row, break the loop
break; %( if increase more than 50, doing exploitation only)
% if percentage increase more than 50 percent, the algorithm perform
% exploitation only
end
else
iter= iter + 1;
end
I already do as above code, the problem is, if the loop break, i dont know how to go another loop doing same another optimization method of algorithm then complete the iteration till 50 iteration.

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darova
darova 2020-4-26

1 个投票

Simple example
p = [0.0979 0.1915
0.2707 0.1944
0.4505 0.2968
0.5541 0.4605
0.5956 0.6184
0.6210 0.2617
0.7016 0.2851
0.7523 0.3436
0.7938 0.4488
0.8214 0.6038
0.8422 0.3553
0.8813 0.3670
0.9182 0.4225
0.9412 0.4985
0.9643 0.3699];
x = p(:,1);
y = p(:,2);
x1 = linspace(x(1),x(end));
y1 = interp1(x,y,x1);
a = atan2( diff(y1),diff(x1) ); % angle of each line
dt = abs(diff(a))*180/pi; % angle between neighbour lines in degrees
color = rand(1,3);
plot(x,y)
axis equal
for i = 2:length(x1)-1
if dt(i-1) > 40 % if angle between lines is large (rapid change)
color = rand(1,3);
end
line(x1(i),y1(i),'color',color,'marker','*')
pause(0.1)
end

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