Can someone help me with the representation of the signals?

Answer 1

[Stephan]

plot can not show one single point. Use at least 2 points for w to get a plot - or use scatter.

w=0:10:500;

To avoid further errors replace

w^2

by

w.^2

[Novicov Ioan]

Thank you!

Answer 2

[Image Analyst]

Attach your script. No one wants to type in 12 lines of code just to help you when you could just as easily copy and paste it here. And you need to plot a marker if you just want a single point, like to plot a blue dot do this:

plot(someValue, 'b.', 'MarkerSize', 50)