EEP - File Types

The following table lists the file types which are understood/produced by the EEP modules and points to the file format description (if any). The different files are distinguished by the filename extensions.

Extension Description

cnt continuous data file
the huge EEG/MEG raw-data files

trg trigger file
ASCII list of time/code pairs which mark certain points in the cnt

res ERTS result file
lists informations about the presented stimuli and the subject responses; produced during the EEG session, used in scripts to produce sufficient EEP trg files

rej rejection file
ASCII list of time epochs which usually mark disturbed epochs in the cnt; produced by the automatic classifiers cntreject, cntreject_t or interactively by xeog, xcnt

cls prototype classification
for EOG artifact compensation; ASCII list of prototypic blink/move epochs to derive the propagation factors; produced/used by xeog

pfc propagation factors
the propagation factors for the EOG artifact compensation; produced by xeog, used by cntaverage

avr average file
the ERP data calculated from EEG/MEG; basically one channel/time matrix of means and one matrix of variances per file; compatible with EEP 2.0

cfg configuration file
parameter sets for the different EEP modules; partly compatible with EEP 2.0

lin linear components
produced by cntdetrend; lists straight line parameters for each channel/epoch, these lines are substracted during the cntdetrend run

bsl baseline
produced by cntaverage; lists the mean/variance of the substracted single trial baseline values for each channel/condition

cvd
cvn data/noise covariance matrix
optionally produced (one per condition) by cntaverage; in ASA (ASCII) format

fir FIR filter coefficient vector
ASCII list of the finite impulse response of a desired digital filter; EEP 3.x has a own format but can still read the EEP 2.0 fir's; produced by xfir, used by cntfilter, avrfilter, xavr, xcnt

dat 3D-space head digitizer file
ASCII list of the sensor coordinates in space; used for spatial interpolation in xavr's contour plots and in avrinterpol

n
tab
sas
raw
asc ASCII export of EEP data; produced by avrretrieve and some of the converters to allow subsequent processing in SAS, Excel, awk, perl...

Extension	Description
cnt	continuous data file the huge EEG/MEG raw-data files
trg	trigger file ASCII list of time/code pairs which mark certain points in the cnt
res	ERTS result file lists informations about the presented stimuli and the subject responses; produced during the EEG session, used in scripts to produce sufficient EEP trg files
rej	rejection file ASCII list of time epochs which usually mark disturbed epochs in the cnt; produced by the automatic classifiers `cntreject`, `cntreject_t` or interactively by `xeog`, `xcnt`
cls	prototype classification for EOG artifact compensation; ASCII list of prototypic blink/move epochs to derive the propagation factors; produced/used by `xeog`
pfc	propagation factors the propagation factors for the EOG artifact compensation; produced by `xeog`, used by `cntaverage`
avr	average file the ERP data calculated from EEG/MEG; basically one channel/time matrix of means and one matrix of variances per file; compatible with EEP 2.0
cfg	configuration file parameter sets for the different EEP modules; partly compatible with EEP 2.0
lin	linear components produced by `cntdetrend`; lists straight line parameters for each channel/epoch, these lines are substracted during the `cntdetrend` run
bsl	baseline produced by `cntaverage`; lists the mean/variance of the substracted single trial baseline values for each channel/condition
cvd cvn	data/noise covariance matrix optionally produced (one per condition) by `cntaverage`; in ASA (ASCII) format
fir	FIR filter coefficient vector ASCII list of the finite impulse response of a desired digital filter; EEP 3.x has a own format but can still read the EEP 2.0 fir's; produced by `xfir`, used by `cntfilter`, `avrfilter`, `xavr`, `xcnt`
dat	3D-space head digitizer file ASCII list of the sensor coordinates in space; used for spatial interpolation in `xavr`'s contour plots and in `avrinterpol`
n tab sas raw asc	ASCII export of EEP data; produced by `avrretrieve` and some of the converters to allow subsequent processing in SAS, Excel, awk, perl...