how to not use unique in matlab

In MATLAB, unique() function is used to find unique elements in a given array. However, if you do not want to use the unique() function, then one way to find unique elements in an array is to use a loop to compare each element with all the other elements in the array. The following code snippet shows an example of how this can be done:

main.m
% Define the input array
A = [3 4 2 4 1 3];

% Initialize an empty array to store the unique elements
B = [];

% Loop through each element in the input array
for i = 1:length(A)
    % Check if this element is already in the output array
    if ~any(B == A(i))
        % If not, add it to the output array
        B(end+1) = A(i);
    end
end

% Display the unique elements
disp(B);
382 chars
18 lines

This code will output [3 4 2 1], which are the unique elements of the original array.

However, this method is not very efficient for large arrays, as it requires a lot of comparisons. The unique() function is much faster and more efficient. So, it is recommended to use the unique() function in MATLAB to find unique elements in an array.