Comments (1)
@jiakang the calculation of regularity (specifically stride regularity) requires at least 2 steps, which in the autocorrelation corresponds to at least 3 peaks: one at lag 0 (which should always exist), one corresponding to the step, and one corresponding to a stride
after you calculate the autocorrelation (or run peak detection on the autocorrelation), how many peaks does it have? you should be able to see from plotting the ac signal. the error is saying that the signal doesn't have enough identified peaks
are you testing this on actual gait data, or just some test data? vertical gait acceleration should be periodic enough that you should have enough peaks in the ac signal
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