how can i plot a sine wave which is 5*sin(2*pi*50*t) for 20 seconds and 5*sin(2*pi*55*t) for next 30 seconds and again repeating 5*sin (2*pi*50*t)
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i need to plot a sine wave of 5*sin(2*pi*50*t) for 20 seconds and 5*sin(2*pi*55*t) for 21 to 50 seconds..how can i plot a above mentioned signal using matlab programme?
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Wayne King
2012년 7월 6일
편집: Wayne King
2012년 7월 7일
Your title has something very different from your actual post, so I'm not sure what you actually want. And following your post, did you really want a 1 second gap with no sine wave? This does want you state in the actual body of your post.
t = 0:1/200:50;
x = zeros(size(t));
x = 5*sin(2*pi*50*t).*(t<=20)+5*sin(2*pi*55*t).*(t>20);
plot(t,x)
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Wayne King
2012년 7월 7일
Basically, that is exactly the answer I gave you initially. I have removed the 1 second pause now. See the above example.
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