EEP - cntevents

cntevents

Synopsis


-----------------------------------------------------------------------------
EEP 3.1  Max-Planck-Institute of Cognitive Neuroscience 1996-99
cntevents 3.7   (OSF1 V4.0 alpha)             Wed Sep 15 13:30:21 1999
-----------------------------------------------------------------------------
  cntevents [-p][-s] <src cnt> [<trg out>]
  cntevents [-p] -m  <src cnt> [<trg in> [<trg out>]]
  cntevents -r <src cnt> [<rej out>]
options:
  -s     skip discontinuities("__" and "Rs")
  -m     merge discontinuities into <trg in>
  -r     convert EEP 2.0 rejection marks to ASCII-list
  -p     pipe mode; write triggers to stdout, no log output
files:
  foo.cnt  ->  foo.trg

Description

Each cnt-file stores triggers as reference points in the time axis. Usually, they are recorded during the EEG session. The modules do not use this internal triggers (they use an external ASCII file *.trg) but maintain the internal table if the time axis is changed.

cntevents allows to convert the internal triggers to the external ASCII file.

It can be quite expensive to handle unexpected reset or discontinuity triggers in processing scripts. To work around this, cntevents offers the -s and -m options. Create a "clean" file, modify it, and finally include the resets/cutmarks. Note that cntdetrend, cntaverage, xeog, cntfilter and cntreject need the resets/cutmarks for their correct behavior!