[Eeglablist] Problems with Importing data in EEGLAB

AHMED DAHIR MOHAMED Ahmed.Mohamed at nottingham.edu.my
Wed Aug 5 22:57:13 PDT 2015

Hi All,
Hope this email reaches you well. I am trying to save the data from specific EEG frequencies for each participant so that I can analyse the data off-line. My data was acquired with the 128-channel HCGSN Net station. I am using the below code which is functioning OK.
% for your epoched data, channel 2
[spectra,freqs] = spectopo(EEG.data(2,:,:), 0, EEG.srate);
% delta=1-4, theta=4-8, alpha=8-13, beta=13-30, gamma=30-80
deltaIdx = find(freqs>1 & freqs<4);
thetaIdx = find(freqs>4 & freqs<8);
alphaIdx = find(freqs>8 & freqs<13);
betaIdx  = find(freqs>13 & freqs<30);
gammaIdx = find(freqs>30 & freqs<80);

% compute absolute power
deltaPower = 10^(mean(spectra(deltaIdx))/10);
thetaPower = 10^(mean(spectra(thetaIdx))/10);
alphaPower = 10^(mean(spectra(alphaIdx))/10);
betaPower  = 10^(mean(spectra(betaIdx))/10);
gammaPower = 10^(mean(spectra(gammaIdx))/10);

But when I try to save the data I get the below error even though the file is accurately loaded in the EEGlab gui:
Error using finfo (line 27)
File 'G:\eeglab\eyesclosed48' not found.
Error in uiimport>useAlternateImportTool (line 927)
    type = finfo(fn);
Error in uiimport (line 150)
    if useAlternateImportTool(isSynchronous,fileAbsolutePath,useLegacyModeForCSV)

Error in filemenufcn (line 61)

Error while evaluating uimenu Callback
My questions are:
How can solve the above error? How can I save each frequency data separately (Delta, Gamma, so on) for each participant for all channels? Furthermore, if I want to analyse the data from specific 18 channels only shall I write the code as follows:
[spectra,freqs] = spectopo(EEG.data(1, 18,:), 0, EEG.srate)?
I need the raw data so that I can analyse the data off-line so any help will be appreciated.
Thanks and best wishes,

Dr. Ahmed Dahir Mohamed, PhD (Cantab) CPsychol
Post-Doctoral Fellow in Psychology
Cognitive and Affective Neuroscience
School of Psychology, Faculty of Science,
The University of Nottingham Malaysia Campus
Jalan Broga, 43500 Semenyih
Selangor Darul Ehsan

Current research

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