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. 2011 Nov 9;31(45):16398–16409. doi: 10.1523/JNEUROSCI.4053-11.2011

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Copyright © 2011 the authors 0270-6474/11/3116398-12$15.00/0

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Figure 4. — Comparison of IsoI_BG with ln(IsoD) and ln(LRatio) on all clusters in the 350 cluster dataset along with several case studies. a, Plot of IsoI_BG versus ln(IsoD) and ln(LRatio). Larger, labeled points represent clusters discussed in Results. These clusters are shown in b–e. In b–e, the red cluster is the cluster of interest (highlighted point from a), and the blue cluster is its nearest neighbor. The gray points are the remaining spikes. The left column of b–e shows the slices of the feature space used by IsoI_BG, and the right column shows slices of the feature space used by IsoD. Voltage is in units of millivolts. b, A well-isolated cluster according to both measures. c, A poorly isolated cluster according to both measures. d, A well-isolated cluster according to IsoI_BG and a poorly isolated cluster according to IsoD/LRatio. e, Poorly isolated cluster according to IsoI_BG and a well-isolated cluster according to IsoD/LRatio.