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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2012 Aug 2;59(10):2828–2837. doi: 10.1109/TBME.2012.2211356

Fig. 4.

Fig. 4

Probability density function of the difference between the estimated beat time ûk and the actual time of the original beat uk for our point-process algorithm (PP) and for the four reference methods (N, H, S, S’). The PDF was estimated using kernel density estimation with Gaussian kernels and a bandwidth of 5 ms.