Multichannel Systems NeuroExplorer - Manual (Page 80)

2.18. Instant Frequency
The instant frequency display shows the instantaneous frequency of the spike train (at the end of
each interspike interval, the inverted interspike interval is drawn as a vertical line).
This analysis does not generate numerical results since the graph is drawn directly from the data.
Some generic analysis statistics are available in the Summary of Numerical Results (see below).
Parameters
Parameter Description
XMin Time axis minimum in seconds.
XMax Time axis maximum in seconds
Graph Style An option to draw vertical lines or points.
Summary of Numerical Results
The following information is available in the Summary of Numerical Results
Column Description
Variable Variable name.
YMin Y axis minimum.
YMax Y axis maximum.
Spikes The number of spikes used in calculation.
Mean Freq. Mean firing rate.
Algorithm
The instant frequency display shows the instantaneous frequency of the spike train.
For each spike that occurred at time t[i] it draws the vertical line
from point ( t[i], 0.) to point (t[i], 1/(t[i] - t[i-1])),
where t[i-1] is the time of the preceding spike.
In other words, at the end of each interspike interval, the inverted interspike interval is drawn as a
vertical line.
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