Manuals & Downloads / Repository

In this page you can find links to our manuals and to a code repository. Many of these links are equivalent to those in our Download section in the Neuroelectrics website.

Neuroelectrics' systems include | Enobio (EEG) and | StarStim (EEG/tCS) class devices as well as our universal software controller - | Neuroelectrics Instrument Controller (NIC). Manuals and other downloads are available for both.

Neuroelectrics Download Area for Manuals and software

Please visit http://www.neuroelectrics.com/support/download

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Matlab code

Data Analysis

You can find here a zip file containing the following:

- NE_Viewer.m, a Matlab code to read and plot NE files, together with  
- some data  in .easy format and 
- a folder with the figures NE_Viewer.m generates with this data. 

The data and code are provided as examples of how to use Matlab to read and plot data.

Here is the header of NE_Viewer:

function [NEdata NEdataRefFilPack]= ...

                     NE_Viewer(filepath, ref, fs, LabelsElectrodes,band,T) 
 
% NE_Viewer(filepath) reads Enobio/StarStim (3G, released 2012) data in  
% ASCII (.txt or ".easy") or EDF format, and plots parts of it together 
% with its PSD and spectrogram.
%
% This function is provided as is as an example on how to work with NE instrument 
% data.
% 
% INPUTS: 
% Enobio/StarStim (8 or 20 or 32 Ch) data file path (mandatory) and other optional
% entries: "ref" the optional reference channel (use 0 for none, 999 for 
% an all electrode average), "fs" the sampling rate in S/s, 
% "LabelsElectrodes" a structure containing channel names, and "band" a 
% 2-element array with the low and high filtering frequency, e.g., 
% band=[1 40], in Hz. Finally, "T" is an arracy specifiying initital and 
% final time to analyze (in seconds), e.g., T=[10 130].
%
% OUTPUTS: 
% Returns the original, raw data pack, NEdata, as a Matlab variable.
% preserving the units (e.g., nV, ms). It also returnes NEdataRefFilPack, 
% the processed (referenced, detreneded, filtered) data (in uV). The time
% stamp (in seconds from start of the take) is provided in the last column.
%
% SIDE EFFECTS: creation of "figures" directory if it does not exist, 
%               creation of data plot figures of all Enobio channels, etc. 
% 
%       out = NE_Viewer(filepath) plots the data in the filepath
%       (filepath includes path relative to the Matlab current working 
%       directory of full absolute path), its PSD and spectrogram for each channel, 
%       etc., for 8 channels. As default it assumes a 500 Samples/s
%       sampling rate, and does not reference the data to any other
%       channel.  The code puts figures in a directory under the working
%       directory.
%      
%       NE_Viewer(filepath, ref) references the data to a chosen channel 
%       (ref should be a Channel number from 1 to 8 (or 20 for Enobio20), 
%       or zero to force no reference - the default). A reference = 999
%       means the average of all electrodes is used as reference.
% 
%       In addition, using the call NE_View(filepath, ref, fs) allows 
%       for changing the sampling rate fs in Samples/s. 
%      
%       Use a structure with LabelsElectrodes such as 
%         >> LabelsElectrodes={'Ch1','Ch2','Ch3','Ch4','Ch5','Ch6','Ch7','Ch8'}
%       with 
%         >> NE_View(filepath, ref, fs, LabelsElectrodes) 
%       to add LabelsElectrodes to channel IDs in plots.
% 
%
% EXAMPLE: assuming the data is in a folder called "data", 
%          NE_Viewer('./data/EC.txt')   % uses all defaults
%          NE_Viewer('./data/EC.txt',1)    % spedifies reference channel
%          NE_Viewer('./data/EC.txt',1,500) % specifies Sampling rate
%
%          To specify channel LabelsElectrodes
%          NE_Viewer('./data/EC.txt',1,500, ...
%                    {'Fp1','Fp2','P3','P4','O1','O1','T7','Pz'} ) 
%
%          To specifiy a filter band other than the default:
%          NE_Viewer('data/StarStim/20120728085042_TBtACS10Hz1mA.txt',0, ...
%                                                         [],[],[1 60]);
% 
%    As another example, 
%           
%       >> [NEdata NEdataRefFilPack]=NE_Viewer('data/Enobio8.txt');
%   and then plot data vs. time 
%       >> figure; plot(NEdataRefFilPack(:,9), NEdataRefFilPack(:,1));
%
% 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.
%
%   Author(s): G.R. - Neuroelectrics Barcelona SL 
%   Copyright 2011-13 Neuroelectrics Barcelona SL
%   $Revision: 0.1 $  $Date: 2011/11/26 $ 
%   $Revision: 0.2 $  $Date: 2012/07/16 $ 
%   $Revision: 0.3 $  $Date: 2012/11/15 $ 
%   $Revision: 0.4 $  $Date: 2013/01/11 $ 
%   $Revision: 1.0 $  $Date: 2013/01/15 $ 
%   $Revision: 1.1 $  $Date: 2013/01/15 $ 

%   References:
%     [1] Enobio users guide. http://neuroelectrics.com