Impact of sampling frequency on period estimation.

<p>Data sets with different time intervals and selected durations were analysed using all the methods and the mean period value is plotted. Data sets were created by adding 80% walking noise to the templates of different duration and time interval between points. The X axis represents time intervals with data duration in brackets. The underlying period was 24.08 h for asym. data and 24.00 h for the other signals. A) cosine data, B) pulse data, C) double pulse data, D) DNFL shoulder data, E) DNFL asymmetry data, F) aggregated results from all the shapes.