% Prompt user for input vector AM
AM = input('Please enter a vector (e.g., [1, 2, 3, 4]): ');

% Check if the number of elements in AM is even
if mod(length(AM), 2) ~= 0
    fprintf('Error: The vector must contain an even number of elements.\n');
else
    % Initialize variables for product of even elements and sum of odd elements
    product_even = 1; % Start at 1 for multiplication
    sum_odd = 0;      % Start at 0 for addition

    % Iterate through each element in AM
    for i = 1:length(AM)
        if mod(AM(i), 2) == 0  % Check if the element is even
            product_even = product_even * AM(i);
        else  % The element is odd
            sum_odd = sum_odd + AM(i);
        end
    end

    % Calculate PDS
    if sum_odd ~= 0  % Prevent division by zero
        PDS = product_even / sum_odd;
        fprintf('The result PDS is: %.4f\n', PDS); % Display the result
    else
        fprintf('Error: Sum of odd elements is zero, cannot compute PDS.\n');
    end
end