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<p style="margin-top:0; margin-bottom:0">Dear Fiedtrippers,</p>
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<p style="margin-top:0; margin-bottom:0">I have been using the following code to calculate Granger Causality, across various conditions (ranging from 2.5 to 3 minutes long, 4 second epochs). </p>
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<div><span style="color: rgb(117, 123, 128);"> cfg = [];</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.output = 'fourier';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.method = 'mtmfft';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.channel = {'Fp1', 'Fp2', 'F7', 'F3', 'Fz', 'F4', 'F8', 'FT7', 'FC3', 'FCz', 'FC4', 'FT8', 'O1', 'Oz', 'O2', 'T7', 'T8', 'TP7', 'TP8'};</span></div>
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<div><span style="color: rgb(117, 123, 128);">cfg.taper = 'dpss'; </span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.tapsmofrq = 5;</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.pad = 'maxperlen';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.padtype = 'zero';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.foilim = [13 30];</span></div>
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<div><span style="color: rgb(117, 123, 128);">cfg = [];</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.method = 'granger';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.granger.method = 'bivariate';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> %cfg.hasjack = '0';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> grangerEC = ft_connectivityanalysis(cfg, freqEC);</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg = [];</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.parameter = 'grangerspctrm';</span></div>
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<div><span style="color: rgb(117, 123, 128);"> cfg.zlim = [0 1];</span></div>
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<div><span style="color: rgb(117, 123, 128);"> ft_connectivityplot(cfg, grangerEC); </span></div>
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<div>For two conditions, the above code was able to evaluate granger causality between 0 and 1. However, for other conditions I am working on currently, the resulting values range from 0 to 4. Therefore, I was wondering whether there is an error in the code
which does not pick up certain data for other conditions.</div>
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<div>Below is a visual representation:</div>
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<div><img size="104803" id="img825220" tabindex="0" style="max-width: 99.9%; user-select: none;" data-outlook-trace="F:1|T:1" src="cid:5b0676da-26fa-4371-9aef-d945d1139572"><br>
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<div>Any help would be greatly appreciated. </div>
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<div>Kind regards,</div>
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<div>Kimaya Sarmukadam</div>
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