The package consists of several programs (modules) to process digitized EEG/MEG records(cnt-files) and the ERP's(avr-files) derived from these records.
Each module is started by a shell-command and is controlled by command line arguments and, optionally, by a configuration file. Protocol output is directed into the standard output channel. Status and error messages are directed into the standard error channel. After successful operation a value of 0 (zero) is returned to the calling process, otherwise a different value.
EEP is not a general purpose signal processing toolkit. It offers only the most frequently needed facilities for ERP studies in its highly specialized modules.
New users should be able to work with the Unix operating system (file management, view/edit textfiles, shell) and should know the fundamentals of the ERP methodology. Then they should start by browsing this page as well as the "Usage" page to get a first overview.
Normally, EEP is installed ready-to-use. No per-user configuration is required. Some useful sample data files are available in the EEP directory:
cfg - sample configurations fir - sample filter coeffs app-defaults - resource templates for Motif apps doc - the HTML documentation
--help
argument
and the configuration file comments should give
you sufficient information.The modules are classified according to its main purpose into Converter, Viewer, Data Management and Signal Processing. Of course, this classification is not perfect. For example, you can find signal processing options in the viewer programs or management functionality in the converters.
Name | Purpose | OSF1 alpha |
Linux i386 |
IRIX mips |
SunOS sparc |
DOS i386 |
ns2riff | NeuroScan SynAmps EEG Import | x | x | x | x | |
bti2riff | BTi MEG Import | x(1) | ||||
refa2cnt | TMS PORTI-32/MREFA EEG Import | x(1) | ||||
pegasus2cnt | Pegasus 2 Import | x | ||||
egiraw2cnt | Electrical Geodesics 'Simple Binary Format' | x | ||||
wg2cnt | Walter Graphtek Raw Data Import | x | x | x | ||
wasc2cnt | ASCII Raw Data ("Bonn-style") Import | x | x | x | ||
sig2cnt | BrainLab Raw Data Import | x | x | x | ||
eep2riff | EEP 2.0 Format Import | x | x | x | x | |
riff2eep | EEP 2.0 Format Export | x | x | x | x | |
edf2cnt | European Data Format Import | x | ||||
cnt2edf | European Data Format Export | x | ||||
cnt2asc | ASCII Raw Data Export | x | x | x | ||
avr2asc | ASCII ERP Data Export | x | x | x | ||
raw2cnt | Generic Raw Data Import Filter | x | x | x | ||
mex funcs | Data Exchange with Matlab/Octave | x | x | x |
Name | Purpose | OSF1 alpha |
Linux i386 |
IRIX mips |
DOS i386 |
cntview | print cnt header informations | x | x | x | |
avrview | print avr header informations | x | x | x | |
xcnt | EEG/MEG Raw Data Viewer | x | x | x | |
xeog | Electrooculogram Epoch Classification | x | x | x | |
xavr | ERP Data Viewer | x | x | x |
Name | Purpose | OSF1 alpha |
Linux i386 |
IRIX mips |
DOS i386 |
cntsetup | patch labels, scalings, compute bipolar channels etc. | x | x | x | |
cntepoch | cut raw data records | x | x | x | x |
cntcat | Raw Data Concatenation | x | x | x | x |
cntdown | Raw Data Downsampling | x | x | x | |
cntmono | obsolete, use cntsetup | x | x | x | |
cntevents | extract control data from signal archives | x | x | x | |
cnttrials | classify trials rejected or not(as cntaverage would do) | x | x | x | |
trged | Trigger Recoding | x | x | x | x |
avrdown | ERP Data Downsampling | x | x | x | |
avrmerge | merge avr's with different channel sets to one file | x | x | x | |
avrchannels | remove or rename channels in avr files | x | x | x |
Name | Purpose | OSF1 alpha |
Linux i386 |
IRIX mips |
DOS i386 |
cntfilter | Finite Impulse Response Filter | x | x | x | |
xfir | Finite Impulse Response Filter Design | x | x | x | |
cntreref | Raw Data Rereferencing | x | x | x | |
cntdetrend | remove offsets and linear trends | x | x | x | |
cntreject | mark disturbed signal epochs | x | x | x | |
cntreject_t | mark disturbed trials | x | x | x | |
cntaverage | Single Subject ERP Calculation | x | x | x | |
avrfilter | ERP Finite Impulse Response filter | x | x | x | |
avrdiff | calc ERP differences | x | x | x | |
avrreref | ERP Rereferencing | x | x | x | |
avraverage | ERP Grand Averaging | x | x | x | |
avrretrieve | ASCII Export of ERP Dataset Information | x | x | x | |
avrprocess | Basic ERP Operations | x | x | x | |
avrinterpol | Spatial ERP Interpolation | x | x | x | |
avrdetrend | remove linear trends from ERP's | x | x | x |
Some more detailed descriptions of the computations behind the szenes are collected in a separate document(draft). It is available in PostScript and dvi.