I did step function from data that generated from Simulink. the graph is the one that I need and there's possible number for overshoot value. however the step info didnt show.

%graph

figure()

subplot(2,1,1)

plot(out.tout,out.res(:,2),'-k')

hold on

plot(out.tout,out.res(:,1),'--k')

hold on

plot(out.tout,out.res1(:,1),'--b')

hold on

plot(out.tout,out.res2(:,1),'--g')

%Step infor

stepinfo(out.tout,out.res(:,1))

stepinfo(out.tout,out.res1(:,1))

stepinfo(out.tout,out.res2(:,1))

[Sam Chak]

Can you save the structured data 'out' in the mat-file and attach the file here? Click the paperclip icon.

save myOut.mat

Answer 1

[Brahmadev]

Hi @Aidi Farhan Mohamed Sadik,

As per the code you have provided, I am assuming that "out.res" has the output data and "out.tout" has the corresponding time vector. You could try exchanging the arguments for "stepinfo" for more meaningful information.

stepinfo(out.res(:, 1), out.tout);

You can also refer to the following example for more information on the usage:

https://www.mathworks.com/help/ident/ref/dynamicsystem.stepinfo.html#d126e214153:~:text=2.6873%0A%20%20%20%20%20%20%20%20%20PeakTime%3A%208.0530-,Step%2DResponse%20Characteristics%20from%20Response%20Data,-Try%20This%20Example

Hope this helps!