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Fig. 3


Main plot: comparison of the exactly known input periods P1in and output periods P1out for the noise-free case. The most significant period P1out can be recovered fairly well. P1out is on average 2.4% shorter than the actually contained period P1in. Small plots: the distribution of P1out is shown with increasing noise from top to bottom. For higher noise levels the fraction of periods lower than 0.5 cycles increases because the algorithm interprets the noise as short periods (compare Table 4).

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