How to do this loop

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.

[darova]

You need to use two loops, Something like

while i < 45
    i = i + 1;
    % code
    if rapid_change
        %restart exploration
    end
end

[Munira]

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.

Answer 1

[darova]

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

[Munira]

OK, tq Sir.. I try to edit my algorithm