ploting a signal which has different frequency

Hi,

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

Answer 1

[sixwwwwww]

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;
end

Answer 2

[Image Analyst]

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.

Answer 3

[Faranak]

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.

[sixwwwwww]

can you show sample output what you actually need as output?