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Analysis Help
Analysis: W.F. activity start & stop time analysis


The start or stop of activity on the waveform selected by the "Y-axis W.F. #" is plotted with respect to the start or stop of activity on the waveform selected by the "X-axis W.F. #". A point is plotted for each cycle on the waveform selected by the "Cycle W.F. #", and the start or stop times are calculated relative to the start of the cycle in which they occur. If the "Normalization" option is enabled, times are calculated as a percentage of the cycle length.

If the option "Base X on stop time" is enabled, times for the end of activity, rather than for the start of activity, are used for the X coordinates. If the option "Base X on spike trains" is enabled, the start or end of spike trains for this waveform are used for the X coordinates, rather than the usual (duty cycle) activity. The "X-axis cycle offset" is used to effectively time-shift the cycles for the purpose of determining in which cycle a particular burst of activity or spike train falls. This allows more reliable results in borderline cases. For example, if a burst usually starts somewhat after the start of the cycle, but starts a bit early for a few cycles, you can select a negative offset of a few milliseconds so that these few bursts will properly be associated with the cycles in which they occur, even though they start a few milliseconds before the start of their associated cycles. Similarly, a positive offset can be used if a few bursts end slightly after the end of the cycle in which they occur. Note that this offset does not affect the calculation of the coordinate, so it is possible to get negative points plotted. Similar options for the Y-axis waveform exist, and are used in the same way.

If the "Cycle durations on X" option is enabled, the usual X-axis is overridden by the cycle durations. In other words, the graph becomes one of start or stop time of activity in cycle, versus cycle duration.

 

Key sequence  Parameter Initial Value
<Esc>AS  Analysis method  W.F. activity start & stop time analysis
<Esc>SF  Run file  ?
<Esc>SRS  Start of run  0 msec
<Esc>SRE  End of run  2.14748e_08 msec
<Esc>SRD  # of deleted sections  0
<Esc>SCW  Cycle W.F. #  ?
<Esc>Wn<CR>SCV  Cycle crossings  ?
<Esc>SCS  Base cycles on stop time  N
<Esc>SCT  Base cycles on spike trains  N
<Esc>SMSXW  X-axis W.F. #  ?
<Esc>SMSXC  X-axis cycle offset  0 msec
<Esc>SMSXS  Base X on stop time  N
<Esc>SMSXT  Base X on spike trains  N
<Esc>SMSYW  Y-axis W.F. #  ?
<Esc>SMSYC  Y-axis cycle offset  0 msec
<Esc>SMSYS  Base Y on stop time  N
<Esc>SMSYT  Base Y on spike trains  N
<Esc>SMSC  Cycle durations on X  N
<Esc>SGN  Normalization  Y
<Esc>SCP  Percent of cycle active  0
<Esc>SDD  Graph description  ""
<Esc>SDM  Main graph title  ""
<Esc>SDGG  Graph type  Adaptive
<Esc>SDGD  Diamond symbol size  5
<Esc>SDGT  Graph tag symbol  ""
<Esc>SDSA  Auto scale  Y
<Esc>SDSR  Round out scale bars  Y
<Esc>SDSXS  X scale bars  Y
<Esc>SDSYS  Y scale bars  Y
<Esc>SDSXL  Min X  0
<Esc>SDSXU  Max X  0
<Esc>SDSYL  Min Y  0
<Esc>SDSYU  Max Y  0
<Esc>SDTT  Top title display  Y
<Esc>SDUT  Time units  msec

 


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Copyright © 2017 G. R. Detillieux, Spinal Cord Research Centre, The University of Manitoba.