Chopping a wave(signal)

I have a long waveform but i am interested in a small segment of the waveform.How do I chop the signal in matlab?

Answer 1

[Fangjun Jiang]

Can you clarify? Could be very simple.

t=0:0.1:10;
signal=sin(t);figure(1);plot(signal);
NewSignal=signal(1:50);figure(2);plot(NewSignal);

[Paulo Silva]

instead of the signal(1:50) we can use the time vector like this

signal(t<=5) %just the first five seconds

[Fangjun Jiang]

Nice, that could facilitating a better plot (with the right x axle mark). Thanks!

Selection=(t>1) & (t<6)

plot(t(Selection),signal(Selection));