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ploting a signal which has different frequency

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I want to plot a signal which has different frequency,This is the exactly what I want:
I want to plot the heart beat of a person which his heart beat,after a couple of minutes exercising, start from 10 and decrease to 1 , What should I use for the code? Thanks

Answers (3)

sixwwwwww on 3 Dec 2013
Edited: sixwwwwww on 3 Dec 2013
Dear Faranak, do you need something like this:
x = 0:0.01:2 * pi;
count = 0;
for i = 5:-1:1
y = sin(i * x);
plot(x + count * 2 * pi, y), hold on
count = count + 1;

Image Analyst
Image Analyst on 3 Dec 2013
I assume you already have the signal somehow, such as from an ecg machine. So then why can't you just plot it with the plot() function? If you don't have the signal yet, then let us know how you're planning on getting it, such as you'd like to synthesize a fake one, or whatever.

Faranak on 3 Dec 2013
Thank you for your answers. I want my signal to be a train of impulse signal,not a sin one.I do not have the signal,I just have the frequency.

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