Why my covolution is not what I expected?

I try to do a convultion of a rectangular function and a function which is the sum of 4 impulse function added together, and the simulink model is as the figure follow:

I was expected my convlution something like the figure below when I made this with Matlab by using rectpuls to create the rectangular function and impulse function :

But what i got from Simulink is as follow:

Why the simulink results are different to the Matlab results?

[Nikhil Sonavane]

Can you share the Simulink model as it would be easier to examine its settings

[Geoffrey Lo]

I've uploaded the matlab code and Simulink model

Answer 1

[Nikhil Sonavane]

There are other similar MATLAB Answers which have the solution for your problem. You may refer to them for further details-

• MATLAB Answer 1

• MATLAB Answer 2