Importing Recorded Data Into Neuroexplorer; Importing Recorded Data Into Matlab - NeuroNexus SmartBox Instruction Manual

SOFTWARE

Importing Recorded Data into NeuroExplorer

The recorded .rhd files from the SmartBox can be easily converted to .nex files using a file converter developed by NeuroNexus Technologies. These
.nex files can be imported into NeuroExplorer for further processing. Once the file converter is installed, the option to convert the file to .nex fomat
appears in the right-click menu. Simply right-click on the .rhd file and click "Convert this file to .nex."

Importing Recorded Data into MATLAB

NeuroNexus Technologies provides an open-source m-file (read_Intan_RHD2000_file.m) for importing data recorded from the SmartBox interface
™
software into MATLAB. Make sure you have the latest version of this m-file to ensure compatibility with the new version of the GUI software. Running
this m-file brings up a file selector dialog with which the user locates and selects the desired .rhd data file. The m-file then loads and parses the data
file and creates several variables in the base MATLAB workspace containing all voltage waveforms, time vectors, bandwidth information, and amplifier
channel settings (e.g., name, channel number, last measured impedance). Since the m-file creates variables in the base workspace, it is recommended
that all other variables be deleted by using the "clear" command before running this function.
Following is a transcript of a typical MATLAB session loading a recorded data file and looking at several data structures:
>> clear
>> read_Intan_RHD2000_file
Reading Intan Technologies RHD2000 Data File, Version 1.4
Found 32 amplifier channels.
Found 3 auxiliary input channels.
Found 1 supply voltage channel.
Found 0 board ADC channels.
Found 0 board digital input channels.
Found 0 board digital output channels.
Found 0 temperature sensor channels.
File contains 60.012 seconds of data. Amplifiers were sampled at 20.00 kS/s.
p.22
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