What am I doing wrong. My frequency should be like the picture.

my simulation looks like this

and below is my code.

clc
clear all
a = 2;
b = 3; 
c = 0.25;
d = 1;

SimData = sim('Jgerman_Part_a_Model');
Yvals=SimOut;
Xvals=TimeOut;



figure()
plot(Xvals,Yvals)
grid
title('Problem 1.2a Simulated Output')
xlabel('Time')
ylabel ('Output Amplitude')

plot looks like this but it doesn't match to the expected graph below.

What exactly am I doing wrong.

[Jorje German]

Thank you very much

Answer 1

[Ameer Hamza]

Double-click the "Sine Wave" block and set the frequency to 2*pi.