Fig 3. Interspike time- and frequency-count histograms of a single-cell record.

(A), (C) Interspike time histograms f(δt) and f(δτ) before and after time rescaling, respectively. (B),(D) Frequency-count histograms P(k) (for a time-interval of T = 2.7 s width) and P(κ) (for a rescaled time-interval of $\overline{\tau }=4.0$ width) before and after time rescaling, respectively. The histograms f(δt) and f(δτ) are fitted with gamma (solid lines) and exponential distributions (dashed lines). The frequency-count histograms P(k) and P(κ) are fitted with the gamma-count (see text, solid lines) and Poisson distributions (dashed lines). The number of spikes was 914. Inset plots in (A) and (C) show the spike rates of the original and time-rescaled spike series, respectively.