Supported File Formats

• [ASCII] Available for input and output.For input this format specification corresponds to the SHORT WITH WAVEFORMS-ASCII export format which is selectable from the program GUI. NEV2lkit expects for input that these files have the extension .asc

The first 4 lines contain general information:

1. the sampling frequency (3000 in the upper figure means 30 kHz)

2. the number of values which is saved for the signal waveform of each spike

3. the total number of electrodes/ active channels in the file

4. header information for the following data.

Each individual spike is exported in one line over several columns.

1. First column holds its unit identifier (e.g. 42.3 means unit 3 recorded on electrode 42; the unit identifier ``0'' is used for unsorted data)

2. second column holds the time stamp (in seconds)

All other columns in the line hold the signal waveform of the spike (in mV). If the SHORT format was selected for export from NEV2lkit the 4 header lines and only the first 2 columns (unit identifier and time) are stored in the saved ASCII files.

• [NEV] Available for input and output. The Neuronal EVent format. The specifications for version 2.0 of this binary file format are available here. For input NEV2lkit expects that these files have the extension .nev . The program is able to read version 1 and 2 of this file format, but files are only saved according the version 2 specifications. A sample file (NEV2.0) is provided with the NEV2lkit installation in the examples folder.


• [Surflab] Available for input only. A simple ASCII based file format which might be easily used to adapt your data for input. First line holds the number of active channels/electrodes (equal to the number of data columns in the file), the second line the sample frequency used (50000 means the data entries are sampled at 50 kHz). Each of the following columns represent a single recording electrode. Hence the continuous voltage change on each electrode is stored in its individual column. NEV2lkit expects for input that these files have the extension .lab


• [LabVIEW] Available for input only. ASCII based file format which can be written from LabVIEW using some of LabVIEW's Virtual Instruments (VI). NEV2lkit expects for input that this files have the extension .lvm . Files in this format hold data of up to 16 channel each acquired at an individual sampling frequency. If like to know more about this format and how it is generated from Labview feel free contact u.