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Update bst_connectivity.m #492

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Update bst_connectivity.m #492

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19 changes: 8 additions & 11 deletions toolbox/connectivity/bst_connectivity.m
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Expand Up @@ -483,7 +483,7 @@
nFreqBands = size(OPTIONS.Freqs, 1);
BandBounds = process_tf_bands('GetBounds', OPTIONS.Freqs);

% ===== IMPLEMENTATION G.DUMAS =====
% ===== IMPLEMENTATION G.DUMAS - Update D.Marinazzo 2021 =====
% Intitialize returned matrix
R = zeros(size(sInputA.Data,1), size(sInputB.Data,1), nFreqBands);
% Loop on each frequency band
Expand All @@ -503,7 +503,10 @@
phaseB = HB ./ abs(HB);
% Compute PLV
% Divide by number of time samples
R(:,:,iBand) = (phaseA*phaseB') / size(HA,2);
R(:,:,iBand) = (phaseA*phaseB') / size(HA,2);

% this would be the ciPLV
% R(:,:,iBand) = (imag((phaseA*phaseB') / size(HA,2)))./sqrt(1-(real((phaseA*phaseB') / size(HA,2))).^2);
end
% We don't want to compute again the frequency bands
FreqBands = [];
Expand Down Expand Up @@ -545,15 +548,9 @@
iB = reshape(repmat(1:nB, nA, 1), [], 1);
% Compute the PLV in time for each pair
R(:,:,iBand) = exp(1i * angle(HA(iA,:)./HB(iB,:)));
%R(:,:,iBand) = exp(1i * (angle(HA(iA,:)) - angle(HB(iB,:))));

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% The implementation below is faster in the time-independent case,
% here not so much for big nA and nB, still putting it for consistency
%phaseB = HB(iB) ./ abs(HB(iB));
%phaseA = HA(iA) ./ abs(HA(iA));
%R(:,:,iBand)=(phaseA.'.*phaseB').';
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% this would be the ciPLV
% R(:,:,iBand) = (imag(exp(1i * angle(HA(iA,:)./HB(iB,:)))))./sqrt(1-(real(exp(1i * angle(HA(iA,:)./HB(iB,:))))/nTime).^2);

end
% We don't want to compute again the frequency bands
FreqBands = [];
Expand Down