Finding time interval between 2 peaks

I downloaded a sample EKG signal to test some digital filtering techniques in Matlab, but I am unsure of how I could obtain the time interval between 2 peaks. Does anyone know how I could get started with this?

Answer 1

[Star Strider]

If you have the Signal Processing Toolbox, use the findpeaks function. It has a number of name-value pair arguments that make R-wave detection (assuming a Lead II) straightforward. It will require some experimentation.

[Michael Morotto]

I don't think I have the Signal Processing Toolbox but I'm going to download it and see if I can get something working. Thank you for taking the time to respond.

[Star Strider]

My pleasure.

If you’re doing biomedical signal analysis, the Signal Processing Toolbox is necessary. You will need it for filtering and time-frequency analysis as well as peak-finding.

There are peak-finding routines on the File Exchange as well. (I’ve not used them so I’ve no experience with them.)