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<p>Hi, <br>
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<p>My plan was to do bipolar re-referencing of two electrode shanks separately using cfg.groupchans.<br>
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<p>I tried to use cfg.groupchans to do a bipolar re-referencing of electrodes that are located on two shanks. The electrodes were named AL101, AL102, AL103, .... and BL101, BL102, BL103, ....</p>
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<p>I then used:<br>
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<div>cfg = [];<br>
cfg.channel = 'all'; this is the default<br>
cfg.reref = 'yes';<br>
cfg.refmethod = 'bipolar';<br>
cfg.refchannel = 'all';<br>
cfg.groupchans = 'yes';</div>
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dataRef = ft_preprocessing(cfg, dataPrepro);</div>
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<div>I was then expecting that the bipoalr referencing would take place on only the respective electrode groups AL and BL. However, one pairing after the bipolar rereferencing was e.g. AL101-BL101.</div>
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<div>Did I do somewthing wrong? Any help is welcome...</div>
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<div>Thanks,</div>
<div>best,</div>
<div>Rüdiger<br>
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