Multichannel Systems NeuroExplorer - Manual (Page 46)

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Principal Component Analysis creates a set of population vectors based on correlations between
activities of individual neurons.
2.1.6. Waveforms
The waveform data type is used in NeuroExplorer to store the spike waveform values together with
the spike timestamps. The following figure shows the waveform variable sig006a_wf together with the
corresponding spike train sig006a:
The waveform data may not be imported by default from the data files created by the data acquisition
systems. Use View | Data Import Options menu command to specify which data types
NeuroExplorer will import from the data files.
The waveform variables can be used in the following analyses:
Rate Histograms
Rasters
Perievent Histograms (instead of PST, NeuroExplorer calculates spike-triggered average for a
waveform variable)
Viewers
You can view the waveforms of the selected variables in the graphical display ( View | 1D Data
Viewer menu command, see figure above).
Numerical values of the waveforms and their timestamps are shown in the Waveforms sheet of the
Data view.
To select a different waveform variable, click in the cell located in the row 1 of the Variable column
(the cell shows sig001i_wf in the figure above).
Waveform values are shown in columns labeled 1, 2, etc.
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