Files & Formats
Neuroelectrics devices generate a series of files:
- The ".easy" data format (ASCII) - The ".info" file (ASCII) - The ".edf" (EFF+) and ".nedf" data formats (binary) - The ".stim" file (ASCII) - SD card data
Stimulation generated files
Neuroelectrics stimulation StarStim class devices generate stimulation specific files as well as EEG data. Here we describe the former (for EEG see the EEG data section).
the .stim file
the .info file associated with a stimulation session
EEG data files and formats
The .easy data format (ASCII)
ABOUT THE NE ASCII DATA FORMAT (July 2012): NE ASCII files contain one line per time sample. Each line contains first the EEG data (8 or 20 channels, depending on the device, with units in nV), followed by three acceleration channels (aX,aY,aZ in mm/s^2- millimeters per second squared), an *optional* external input channel, a trigger flag (int32) and, finally, a timestamp in Unix time (ms from Jan 1 1970): Ch1(nV) ... Ch8or20(nV) aX(mg) aY(mg) aZ(mg) AddSensor Flags(uint32) TimeStamp (ms) Therefore Enobio8/StarStim will have a minimum of 8+2 (10) columns, or 8+3=11 if no accelerometer or >= 8+4 (with accelerometer). In summary: Enobio8/20 10 Columns: no AddSensor, no accelerometer data: 11 Comumns: no accelerometer, but there is AddSensor 13 Columns: there is accelerometer, but no Addsensor 14 Comumns: there is accelerometer, AddSensor. Enobio 20 will have >= 22 and >=24 columns if acc. data present: 22 Columns: no AddSensor, no accelerometer 23 Comumns: no accelerometer, but there is AddSensor 25 Columns: there is accelerometer, no AddSensor 26 Comumns: there is accelerometer, AddSensor. Enobio 32 will have >=34 adn >=36 if acc data is present 34 Columns: no AddSensor, no accelerometer 35 Comumns: no accelerometer, but there is AddSensor 37 Columns: there is accelerometer, no AddSensor 38 Comumns: there is accelerometer, AddSensor.