MATLAB: Finding time interval between 2 peaks

ekg

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?

Best Answer

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.

Related Solutions

MATLAB: How to find the period or frequency of a signal

I would first detrend (link) your data, then use findpeaks (link) to identify the peaks and their locations. Use the location information to calculate the period and from that, frequency.

MATLAB: Unable to perform assignment because the left and right sides have a different number of elements.

Since ecgBR has only one row, not n, you cannot do ecgBR(n, 1), which is the nth row in column 1. But you have 3600 columns, not 1, and 1 row, not 3600. Get rid of the ,1:

for n=5:numel(ecgBR)
    ecg_dif(n)=abs(ecgBR(n)-ecgBR(n-2));
    ecg_dif2(n)=abs(ecgBR(n)-2*ecgBR(n-2)+ecgBR(n-4));
end

Best Answer

Related Solutions

MATLAB: How to find the period or frequency of a signal

MATLAB: Unable to perform assignment because the left and right sides have a different number of elements.

Related Question