Plotting a specific time interval in Matlab

Question

I have a signal, let's say x, with a dimension of 60000x1 and i'm plotting it in time, t.

x = % a 60000x1 signal

fs = 1000;

t = 0:1/fs:(length(x)-1)/1000; % i want to plot the signal in seconds and it's correct

so if i plot(t,x); it plots my signal in seconds (from 0 to 60s)

question is: How do i plot a specific time interval? (eg from 3 to 5s)

i tried plot(t(3:5),x(3:5)); and it plots x based on its original dimension i guess. so it will work at plot(t(3000:5000),x(3000:5000) but my x label is incorrect.

Any help will be appreciated! Thank you!!

Answer 1

There are two ways to achieve this. The first one is to define a subset of values:

I = 3000:5000;
plot(t(I), x(I));

The second method is to use the xlim setting:

plot(t,x);
xlim([3 5]);

which will set the bounds of the plot at 3 and 5 seconds.