{"action":"created","issue":{"url":"https://api.github.com/repos/mne-tools/mne-python/issues/3461","repository_url":"https://api.github.com/repos/mne-tools/mne-python","labels_url":"https://api.github.com/repos/mne-tools/mne-python/issues/3461/labels{/name}","comments_url":"https://api.github.com/repos/mne-tools/mne-python/issues/3461/comments","events_url":"https://api.github.com/repos/mne-tools/mne-python/issues/3461/events","html_url":"https://github.com/mne-tools/mne-python/pull/3461","id":167732073,"number":3461,"title":"Add fiff eeg ref dig","user":{"login":"cjayb","id":5610076,"avatar_url":"https://avatars.githubusercontent.com/u/5610076?v=3","gravatar_id":"","url":"https://api.github.com/users/cjayb","html_url":"https://github.com/cjayb","followers_url":"https://api.github.com/users/cjayb/followers","following_url":"https://api.github.com/users/cjayb/following{/other_user}","gists_url":"https://api.github.com/users/cjayb/gists{/gist_id}","starred_url":"https://api.github.com/users/cjayb/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cjayb/subscriptions","organizations_url":"https://api.github.com/users/cjayb/orgs","repos_url":"https://api.github.com/users/cjayb/repos","events_url":"https://api.github.com/users/cjayb/events{/privacy}","received_events_url":"https://api.github.com/users/cjayb/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":10,"created_at":"2016-07-26T23:00:15Z","updated_at":"2016-07-31T12:07:44Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/mne-tools/mne-python/pulls/3461","html_url":"https://github.com/mne-tools/mne-python/pull/3461","diff_url":"https://github.com/mne-tools/mne-python/pull/3461.diff","patch_url":"https://github.com/mne-tools/mne-python/pull/3461.patch"},"body":"Just stumbled on `mne.io.add_reference_channels`, which is great for our custom Easycaps with reference at FCz. Now we can easily re-create the \"missing\" channel, particularly favoured by auditory researchers :)\r\n\r\nThis PR adds the location of the Ref channels to `info['chs']`, which is good for topographic plots. Neuromag EEG digitisation starts with the Ref and gets the identity `0`, which is what this code is based on. I'm not sure how that would translate to non-Neuromag systems? I'm hoping the test for `len(dig_loc)==1` will at least not cause bugs for them."},"comment":{"url":"https://api.github.com/repos/mne-tools/mne-python/issues/comments/236426419","html_url":"https://github.com/mne-tools/mne-python/pull/3461#issuecomment-236426419","issue_url":"https://api.github.com/repos/mne-tools/mne-python/issues/3461","id":236426419,"user":{"login":"agramfort","id":161052,"avatar_url":"https://avatars.githubusercontent.com/u/161052?v=3","gravatar_id":"","url":"https://api.github.com/users/agramfort","html_url":"https://github.com/agramfort","followers_url":"https://api.github.com/users/agramfort/followers","following_url":"https://api.github.com/users/agramfort/following{/other_user}","gists_url":"https://api.github.com/users/agramfort/gists{/gist_id}","starred_url":"https://api.github.com/users/agramfort/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/agramfort/subscriptions","organizations_url":"https://api.github.com/users/agramfort/orgs","repos_url":"https://api.github.com/users/agramfort/repos","events_url":"https://api.github.com/users/agramfort/events{/privacy}","received_events_url":"https://api.github.com/users/agramfort/received_events","type":"User","site_admin":false},"created_at":"2016-07-31T12:07:44Z","updated_at":"2016-07-31T12:07:44Z","body":"regarding remaining issues. I never encountered the issue myself.\r\n\r\nmaybe @wmvanvliet or @jona-sassenhagen have some suggestion."}}
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