How to calculate the frequencies interval?
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As showed below, how to calculate the frequencies interval in the red box?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1238387/image.png)
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Cameron
am 23 Dez. 2022
I'm a little confused what you're asking, but if you have access to the x and y data then you should be able to use the findpeaks function. For example
x = 0:0.01:10; %simulate some time vector in seconds
y = sin(2.22*x); %simulate some y data
[~,loc] = findpeaks(y); %find peaks. You can check the documentation for additional arguements
plot(x,y,'-',x(loc),y(loc),'o') %plot the data just to see what you're looking at
f = 1/(x(loc(2)) - x(loc(1))); %frequency in Hz
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