square wave not "limited"

hi, I produced this square wave signal, but as you can see the square peaks have no upper limit. how can i solve?

x=0.03*square(f*t,duty)

in reality I seem to see that the graph is the other way around

Answer 1

[Jon]

You probably are not correctly specifiying the duty cycle. If you want the square wave to be "on" half the time you should set duty = 50, also note that the first argument to square is in radians, so each cycle is 2*pi radians. You have to scale your input accordingly.

Answer 2

[Sam Chak]

@Federico Paolucci

Doesn't seem to have any issue.

t    = linspace(0, 3*pi, 3001)';
f    = 2;
duty = 50;
x    = 0.03*square(f*t, duty);
plot(t/pi, x, t/pi, 0.03*sin(2*t))
grid on
ylim([-0.05 0.05])