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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Neural Comput. 2011 Jun 14;23(9):2169–2208. doi: 10.1162/NECO_a_00173

Figure 6.

Figure 6

It is not always possible to choose an appropriate threshold for the interval method. (A–B) In each panel, we show, from top to bottom, (a) the rastergram, (b) the aggregate spike train, and (c) the ISI time series. The relevant timescales are indicated in the graph: the maximum ISI between two spikes in the same event, the minimum ISI, and the maximum ISI between two spikes in different events. An estimate for the threshold, 0.1 times the maximum ISI, is shown as a dashed line in panel c. (A) An example with one spike pattern where an appropriate threshold can be chosen that is higher than the maximum ISI within an event but less than the minimum ISI between events. (B) An example with two spike patterns (labeled by α and β) where there is no such threshold that separates within-event intervals from those between events.