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

2013 4 23
2 个回答
7 次查看（30 天）

回答（2 个）

Walter Roberson
Walter Roberson 2013-4-23

0 个投票

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.

4 个评论
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nickey
nickey 2013-4-23
Thank you, but is it necessary to have increment here?
Walter Roberson
Walter Roberson 2013-4-23
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
Image Analyst 2013-4-24
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
Walter Roberson 2013-4-24
... that would allow you to get positive index numbers ...
But perhaps u and z are functions instead of arrays.

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nickey
nickey 2013-4-28
编辑：Walter Roberson 2013-4-28

0 个投票

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.

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nickey
nickey
2013-4-23

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