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. Author manuscript; available in PMC: 2009 Aug 15.
Published in final edited form as: J Neurosci Methods. 2008 May 28;173(1):34–40. doi: 10.1016/j.jneumeth.2008.05.016

Figure 6.

Figure 6

Quantitative comparison of different filtering methods. Left: The SNR (see Methods) determines spike detectability. Middle: Waveform distortion is calculated as the mean squared Euclidean distance between each cell’s mean unfiltered waveform and mean filtered waveform (n=47 projection cells). The waveforms are normalized such that the unfiltered waveform has peak height 1. The Isolation Distance (see Methods) is calculated using 3 PCA coefficients per wire (on 4 wires) performed on a 400µs window of the spike, centered on the peak.