A Fast $\mathcal{L}_p$ Spike Alignment Metric

Details A Fast $\mathcal{L}_p$ Spike Alignment Metric A Fast $\mathcal{L}_p$ Spike Alignment Metric

2009-07-17

arxiv.org/abs/0907.3137v2

Biology

Quantitative Biology

Neurons and Cognition

Scientific paper

The metrization of the space of neural responses is an ongoing research program seeking to find natural ways to describe, in geometrical terms, the sets of possible activities in the brain. One component of this program are the {\em spike metrics}, notions of distance between two spike trains recorded from a neuron. Alignment spike metrics work by identifying "equivalent" spikes in one train and the other. We present an alignment spike metric having $\mathcal{L}_p$ underlying geometrical structure; the $\mathcal{L}_2$ version is Euclidean and is suitable for further embedding in Euclidean spaces by Multidimensional Scaling methods or related procedures. We show how to implement a fast algorithm for the computation of this metric based on bipartite graph matching theory.

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