while executing teachers phase of TLBO algorithm i am getting the following error, please rectify my mistake (Index in position 1 exceeds array bounds (must not exceed 1)).

%learner phase

%to select a student randomly

sno=1+randi(ns,1,ns);

%to chech the same student not selected

for i=1:ns

while (i==sno(i,1))

sno(i,1)=1+randi(ns,1,ns);

end

end

disp('selected student number:');disp('------');

disp([(1:ns)' sno]);

Answer 1

[Vaibhav]

Hi Venkatesh

The issue lies in the loop where you are updating the sno array. Specifically, the condition (i == sno(i, 1)) is causing the problem. Since sno(i, 1) is always equal to i (due to the assignment inside the loop), the loop becomes infinite.

To rectify this, you can modify the loop as follows:

% Learner phase: To select a student randomly
sno = randi(ns, 1, ns); % Initialize sno without adding 1

% Check that the same student is not selected
for i = 1:ns
    while (i == sno(i))
        sno(i) = randi(ns); % Update sno directly
    end
end

We initialize sno without adding 1 initially, and then directly update its elements within the loop.

Hope this helps!