Multiple Techniques for Sorting Electrodes and Tetrodes

Waveforms can be sorted using a variety of methods, including:

• Manual cluster selection in 3D feature space using principal component projections or voltage slices in time
• Semi-automatic cluster selection in feature space using K-means or Standard E-M (Expectation Maximization)
• Automatic cluster selection in feature space using valley seeking or T-Distribution E-M
• Waveform selection in time-voltage space
• Template matching algorithm