Fig. 3

The graphic user interfaces for offline spike sorting. a The main interface, in which the center shows the control panel for major operations; the bottom panel shows all spikes in the selected channel with a sliding window to select a portion of spikes; the left panel shows the waveforms of the selected spikes, and the right panel shows the principal components of all spikes in the selected channel. Users can check the AutoSortThisChannel box to start automated sorting. In addition, users can use the segment widget (two red lines with square ends) to select waveforms or use the polygon widget (red polygon with square nodes) to select data points for re-sorting. b A 3D view to display the first three principal components of all spikes in the selected channel