how to import openbci (comma delimited data) to bcilab

mizanur36mizanur36 Dallas, TX
in Cyton
How to import the openbci data (8 channel + marker channel) to bcilab

Comments

  • wjcroftwjcroft Mount Shasta, CA
    BCILAB shares code with EEGLAB. Irene did this tutorial,


  • mizanur36mizanur36 Dallas, TX
    I seen that tutorial. But challenges I am having is how I load that data to BCILAB? 
  • wjcroftwjcroft Mount Shasta, CA
    You might find more BCILAB experts on their email list. For example,


  • mizanur36mizanur36 Dallas, TX
    I was going through Irene's document. Not understanding how she generated event file and extracted data from event file. I see below code she mentioned. What is Trials? What below code does? can someone explain. I am bit confused.

    %% FINDING EVENTS

    % Trials Events
     RF_Re = find(Trials == 1); % Move Right Finger
     LF_Re = find(Trials == 2); % Move Left Finger
     RF_Im = find(Trials == 3); % Imagine Moving Right Finger
     LF_Im = find(Trials == 4); % Imagine Moving Left Finger
     Events_row = [RF_Re; LF_Re; RF_Im; LF_Im]; % List of events (based on counts)
     E = sort(Events_row); % List of events (based on counts) sorted

    % Two External Buttons
     RightButton = find(Right == 25120); % RightButton is pressed
     Events_RB = RightButton*4-4; % Translate the row to time
     for RB_Char = {'RightButton'}; % Create 'Right Button' column
     RB = repmat (RB_Char, length(Events_RB),1);
     end
     R = table(Events_RB,RB); % Create a table with Right Button events
     
     LeftButton = find(Left == 25120); % LeftButton is pressed
     Events_LB = LeftButton*4-4; % Translate the row to time 
     for LB_Char = {'LeftButton'}; % Create 'Left Button' column
     LB = repmat (LB_Char, length(Events_LB),1);
     end
     L = table(Events_LB,LB); % Create a table with Left Button events

     % OBSERVATION: Some events are not saved. There is a difference of 2506ms
     % between two different type of events (RF_Re and LF_Re, for example).
     % This means that between two values of the same event there is difference
     % of 10000ms. Currently, you must add this new values manually.
     
     MoveRF = RF_Re(1,:); % Find 1st Move RF Event
     MoveLF = LF_Re(1,:); % Find 1st Move LF Event
     ImagineRF = RF_Im(1,:); % Find 1st Imagine RF Event
     ImagineLF = LF_Im(1,:); % Find 1st Imagine RF Event
     
     Move_RF = (MoveRF:10000:(MoveRF+100000-1000))'; % Create Move RF Event Variable
     Move_LF = (MoveLF:10000:(MoveLF+100000-1000))'; % Create Move LF Event Variable
     Imagine_RF = (ImagineRF:10000:(ImagineRF+100000-1000))'; % Create Imagine RF Event Variable
     Imagine_LF = (ImagineLF:10000:(ImagineLF+100000-1000))'; % Create Imagine LF Event Variable
     
     % Conversion of variables (From counts to time)
     Events_RFRe = Move_RF*4-4; % Translate MoveRF counts into time
     Events_LFRe = Move_LF*4-4; % Translate MoveLF counts into time
     Events_RFIm = Imagine_RF*4-4; % Translate ImagineRF counts into time
     Events_LFIm = Imagine_LF*4-4; % Translate ImagineLF counts into time
     
     Events = [Events_RFRe; Events_LFRe; Events_RFIm; Events_LFIm]; % List of events (based on time)
     Events_Time = sort(Events); % Sort of the 2nd List of Events
  • wjcroftwjcroft Mount Shasta, CA
    Re: events / trials

    https://sccn.ucsd.edu/wiki/Chapter_03:_Event_Processing

    The full set of tutorials is here,


    You are referencing Irene's tutorial on "Import Events", which differs from the "Import Data" tutorial. I pointed you to the Import Data because I assumed there was some way to get from EEGLAB data format to BCILAB format.

    Your best bet is to ask questions on the forum devoted to EEGLAB / BCILAB. Or possibly email Irene directly, But her tutorials are on EEGLAB only, not BCILAB. Her email on her resume,


Sign In or Register to comment.

© Vanilla Keystone Theme 2026