# How to determine fundamental frequencies (beats/minute) of heartbeat? (matlab)

read = matfile('ECG.mat');

So i have read.ecg (signal) and read.Fs. How can i find/count beats/minute in matlab?
• what is the scaling of the $\tau$-axis? is it seconds, milliseconds? sample periods? if the latter, what is the sample rate? can you show the same autocorrelation plot and zoom in close to the $\tau=0$ area? – robert bristow-johnson Nov 15 '18 at 0:05