Hi ,please help , I need to plot signals u(t-3),u (t+1), z(-t-3),,z​(2t+2),u(-​2n-1) and u(3n+2) using subplot and add title ,grid and axis labels

Its about plotting signals in matlab using subplot.

Answer 1

[Walter Roberson]

subplot(1,6,1);
plot(u(t-3));
grid on
ylabel('u(t-3)')

subplot(1,6,2);
plot(u(t+1));
grid on
ylabel('u(t+1)');

subplot(1,6,3);
plot(z(-t-3));
grid on
ylabel('z(-t-3)');

and so on.

[nickey]

Thank you, but is it necessary to have increment here?

[Walter Roberson]

What increment?

If you are referring to the changing number at the end of subplot(), then that number determines which of the 1 x 6 subsection the subplot is to be drawn in. If you were to use the same number each time, the plots would be drawn on top of each other.

[Image Analyst]

t and n should be arrays defining your x axis elements, like

t = 3 : 1 : 100; % or whatever.

I don't know of any integer n that will allow you to get integer index numbers for both -2*n-1 and 3*n+2, so I don't see how u can be a list of values of u.

[Walter Roberson]

... that would allow you to get positive index numbers ...

But perhaps u and z are functions instead of arrays.

Answer 2

[nickey]

t=[-4:0.2:4];
n=[-2:0.1:2];
subplot(3,2,1)
plot(t,heaviside(t-3))
grid on;
title('Time shifted signal')
xlabel('time(s)')
ylabel('volt(V)')

subplot(3,2,2)
plot(t,heaviside(t+1))
grid on;
title('Time shifted signal')
xlabel('time(s)')
ylabel('volt(V)')

subplot(3,2,3)
plot(t,dirac(-t-3))
grid on;
title('Time shifted and reflected signal')
xlabel('time(s)')
ylabel('volt(V)')

At the end this is my code. I hope it will be ok.

Thanks for all comments.

Best regards.