obtain the family of step responses in matlab

main.m
% Define the transfer function of the system
num = [1];
den = [1 1 1];
sys = tf(num, den);

% Define a range of values for the system parameter
K = 0.1:0.1:1;

% Loop over the range of parameter values and compute the step response
figure;
hold on;
for i = 1:length(K)
    % Design the control system using feedback
    Kp = K(i);
    Ki = 0;
    Kd = 0;
    C = pid(Kp, Ki, Kd);   
    T = feedback(C*sys, 1);
    
    % Simulate the step response
    [y, t] = step(T);
    
    % Plot the step response
    plot(t, y);
end

% Add labels to the plot
title('Step Response');
xlabel('Time (s)');
ylabel('System Output');
legend(num2str(K'));
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