# Support & Discussions **URL:** https://mne.discourse.group/c/support-discussions/6.md [Latest](https://mne.discourse.group/latest.md) · [Categories](https://mne.discourse.group/categories.md) · [Tags](https://mne.discourse.group/tags.md) --- ## [How to correctly format your question](https://mne.discourse.group/t/how-to-correctly-format-your-question/7883)
**Author:** [@cbrnr](https://mne.discourse.group/u/cbrnr)\ **Replies:** 0\ **Last updated:** [November 21, 2023, 5:05pm UTC](https://mne.discourse.group/t/how-to-correctly-format-your-question/7883 "2023-11-21T17:05:31Z")
If you have a question or issue with MNE-Python, please include the following info: MNE version: e.g. 1.6.0 Operating system: e.g. macOS 13 / Windows 10 / Ubuntu 22.04 :page\_facing\_up: Always provide relevant code sni… --- ## [About the Support & Discussions category](https://mne.discourse.group/t/about-the-support-discussions-category/2404)
**Author:** [@richard](https://mne.discourse.group/u/richard)\ **Replies:** 0\ **Last updated:** [December 21, 2020, 7:54pm UTC](https://mne.discourse.group/t/about-the-support-discussions-category/2404 "2020-12-21T19:54:31Z")
Post your questions here – ideally after searching for existing answers! --- ## [What do the Axx and $Axx channel names represent in Nihon Kohden EEG files?](https://mne.discourse.group/t/what-do-the-axx-and-axx-channel-names-represent-in-nihon-kohden-eeg-files/11967)
**Author:** [@eulerleibniz](https://mne.discourse.group/u/eulerleibniz)\ **Replies:** 0\ **Last updated:** [September 30, 2026, 1:34pm UTC](https://mne.discourse.group/t/what-do-the-axx-and-axx-channel-names-represent-in-nihon-kohden-eeg-files/11967 "2026-09-30T13:34:59Z")
Hi, I’m using MNE-Python’s read\_raw\_nihon() to read Nihon Kohden EEG files, and I’m trying to understand the meaning of some channels that aren’t standard 10–20 EEG electrodes. For example, one of my recordings contain… --- ## [read\_raw\_bids no longer works when the BIDS directory is read-only](https://mne.discourse.group/t/read-raw-bids-no-longer-works-when-the-bids-directory-is-read-only/11966)
**Author:** [@LaurentH](https://mne.discourse.group/u/LaurentH)\ **Replies:** 0\ **Last updated:** [September 30, 2026, 1:30pm UTC](https://mne.discourse.group/t/read-raw-bids-no-longer-works-when-the-bids-directory-is-read-only/11966 "2026-09-30T13:30:38Z")
Name: mne Version: 1.13.2 Name: mne-bids Version: 0.19.0 operating system: Linux Hello, read\_raw\_bids attempts to write to the folder containing the data and fails with the following error message: “Permission deni… --- ## [BIDS: Eye tracking files with MEG data](https://mne.discourse.group/t/bids-eye-tracking-files-with-meg-data/11963)
**Author:** [@jstout211](https://mne.discourse.group/u/jstout211)\ **Replies:** 2\ **Last updated:** [September 29, 2026, 5:37pm UTC](https://mne.discourse.group/t/bids-eye-tracking-files-with-meg-data/11963 "2026-09-29T17:37:22Z")
Hi All, What is the best BIDS compatible practice for incorporating eyelink eyetracking data with MEG data (specifically CTF .ds datasets/folder). We are posting some data on openneuro as part of the NIMH\_HV protocol, … --- ## [spectral\_connectivity\_time(faverage=True) averages over roughly twice the requested band when a band does not end at the top of the frequency grid](https://mne.discourse.group/t/spectral-connectivity-time-faverage-true-averages-over-roughly-twice-the-requested-band-when-a-band-does-not-end-at-the-top-of-the-frequency-grid/11964)
**Author:** [@marieke.devylder](https://mne.discourse.group/u/marieke.devylder)\ **Replies:** 2\ **Last updated:** [September 25, 2026, 7:16pm UTC](https://mne.discourse.group/t/spectral-connectivity-time-faverage-true-averages-over-roughly-twice-the-requested-band-when-a-band-does-not-end-at-the-top-of-the-frequency-grid/11964 "2026-09-25T19:16:37Z")
In mne\_connectivity/spectral/time.py, \_foi\_average contains f\_e += 1 if f\_s == f\_e else f\_e Since Python parses this as f\_e += (1 if f\_s == f\_e else f\_e), a band whose start and end bins differ gets its end index doubl… --- ## [Adding back the original Pz reference channel before PyPREP: should I apply average reference first?](https://mne.discourse.group/t/adding-back-the-original-pz-reference-channel-before-pyprep-should-i-apply-average-reference-first/11957)
**Author:** [@Ananta](https://mne.discourse.group/u/Ananta)\ **Replies:** 2\ **Last updated:** [September 22, 2026, 8:52am UTC](https://mne.discourse.group/t/adding-back-the-original-pz-reference-channel-before-pyprep-should-i-apply-average-reference-first/11957 "2026-09-22T08:52:37Z")
:red\_question\_mark: If you have a question or issue with MNE-Python, please include the following info: MNE version: 1.13.2 PyPrep version: 0.9.0 operating system: Windows 10 Hello everyone, I am working with a publ… --- ## [Volunteer second opinion on three ambiguous artifact intervals in high-density EEG](https://mne.discourse.group/t/volunteer-second-opinion-on-three-ambiguous-artifact-intervals-in-high-density-eeg/11939)
**Author:** [@viranovskaya](https://mne.discourse.group/u/viranovskaya)\ **Replies:** 2\ **Last updated:** [September 18, 2026, 5:25am UTC](https://mne.discourse.group/t/volunteer-second-opinion-on-three-ambiguous-artifact-intervals-in-high-density-eeg/11939 "2026-09-18T05:25:56Z")
Hi everyone, I am developing and validating a provenance-tracked preprocessing workflow for high-density EEG in MNE-Python. The workflow keeps automated QC prompts separate from manual scientific decisions. I have compl… --- ## [Maxfilter independent gradiometer vs magnetometer processing](https://mne.discourse.group/t/maxfilter-independent-gradiometer-vs-magnetometer-processing/11962)
**Author:** [@iuluc](https://mne.discourse.group/u/iuluc)\ **Replies:** 0\ **Last updated:** [September 17, 2026, 8:58pm UTC](https://mne.discourse.group/t/maxfilter-independent-gradiometer-vs-magnetometer-processing/11962 "2026-09-17T20:58:07Z")
:red\_question\_mark: If you have a question or issue with MNE-Python, please include the following info: MNE version: 1.8.0 operating system: Rocky Linux 8.10 :page\_facing\_up: Please also provide relevant code snippets… --- ## [Something wrong with EEG headset](https://mne.discourse.group/t/something-wrong-with-eeg-headset/11955)
**Author:** [@psymbio](https://mne.discourse.group/u/psymbio)\ **Replies:** 1\ **Last updated:** [September 13, 2026, 9:08am UTC](https://mne.discourse.group/t/something-wrong-with-eeg-headset/11955 "2026-09-13T09:08:45Z")
MNE version: e.g. 1.13.0 Operating system: Ubuntu 24.04.3 LTS I am working with the cognionics CGX system HD-72 and there seems to be some issue in the PSD after I changed the sensors from flew to non-flex and back to … --- ## [rendering source localization plots without plot function](https://mne.discourse.group/t/rendering-source-localization-plots-without-plot-function/11949)
**Author:** [@Kellymahn23](https://mne.discourse.group/u/Kellymahn23)\ **Replies:** 7\ **Last updated:** [September 10, 2026, 10:41am UTC](https://mne.discourse.group/t/rendering-source-localization-plots-without-plot-function/11949 "2026-09-10T10:41:19Z")
MNE version: 0.24.0 operating system: Windows 11 hello, this might be a weird question, but I’ve been searching and haven’t found anything. so i would like to render whatever the stc.plot function renders, like the ma… --- ## [Artifacts in PSD](https://mne.discourse.group/t/artifacts-in-psd/11952)
**Author:** [@ES03](https://mne.discourse.group/u/ES03)\ **Replies:** 1\ **Last updated:** [September 10, 2026, 6:31am UTC](https://mne.discourse.group/t/artifacts-in-psd/11952 "2026-09-10T06:31:23Z")
Dear MNE community, I’m working with a recorded EEG dataset that is relatively noisy. When inspecting the power spectral density of the raw data, I noticed that a subset of electrodes shows a pronounced, rhythmic-lookin… --- ## [How robust are motor-imagery EEG decoders to channel loss?](https://mne.discourse.group/t/how-robust-are-motor-imagery-eeg-decoders-to-channel-loss/11944)
**Author:** [@ZyntZ](https://mne.discourse.group/u/ZyntZ)\ **Replies:** 9\ **Last updated:** [September 1, 2026, 3:03pm UTC](https://mne.discourse.group/t/how-robust-are-motor-imagery-eeg-decoders-to-channel-loss/11944 "2026-09-01T15:03:34Z")
I ran a reproducible benchmark of CSP–LDA and Riemannian tangent-space classifiers on PhysioNet EEG Motor Movement/Imagery and BNCI2014-001. In the completed PhysioNet analysis (n=109), zeroing 50% of channels reduced … --- ## [TFR difference maps](https://mne.discourse.group/t/tfr-difference-maps/11917)
**Author:** [@gmj3](https://mne.discourse.group/u/gmj3)\ **Replies:** 15\ **Last updated:** [August 20, 2026, 9:31pm UTC](https://mne.discourse.group/t/tfr-difference-maps/11917 "2026-08-20T21:31:50Z")
Hello, I’m a beginner practicing analyzing data for a motor dataset in using MNE python. I tried analyzing data for all 109 participants in a dataset : EEG Motor Movement/Imagery Dataset v1.0.0 . For this project, I am … --- ## [Extracting data from clusters with bad electrodes](https://mne.discourse.group/t/extracting-data-from-clusters-with-bad-electrodes/11845)
**Author:** [@anguyen](https://mne.discourse.group/u/anguyen)\ **Replies:** 2\ **Last updated:** [August 18, 2026, 3:27pm UTC](https://mne.discourse.group/t/extracting-data-from-clusters-with-bad-electrodes/11845 "2026-08-18T15:27:36Z")
MNE version: 1.7.0 operating system: Windows 10 Hi everyone, While extracting ERP mean amplitudes, I used to pass explicit channel lists to evoked.pick(), then computed evoked.data.mean(axis=1). Some participants h… --- ## [Issue about MNE GUI for Coregistration](https://mne.discourse.group/t/issue-about-mne-gui-for-coregistration/11940)
**Author:** [@fabios01](https://mne.discourse.group/u/fabios01)\ **Replies:** 1\ **Last updated:** [August 17, 2026, 5:56pm UTC](https://mne.discourse.group/t/issue-about-mne-gui-for-coregistration/11940 "2026-08-17T17:56:25Z")
Hi everyone, I would like to perform sensor co-registration between EEG digitized sensor position from a subject and the headshape from fsaverage template, since I don’t have the MRI of the subject. I’m using the GUI a… --- ## [Why is the number of tapers in mne.time\_frequency.tfr\_array\_multitaper equal to floor(time\_bandwidth - 1)?](https://mne.discourse.group/t/why-is-the-number-of-tapers-in-mne-time-frequency-tfr-array-multitaper-equal-to-floor-time-bandwidth-1/11925)
**Author:** [@Isi](https://mne.discourse.group/u/Isi)\ **Replies:** 1\ **Last updated:** [August 12, 2026, 11:26am UTC](https://mne.discourse.group/t/why-is-the-number-of-tapers-in-mne-time-frequency-tfr-array-multitaper-equal-to-floor-time-bandwidth-1/11925 "2026-08-12T11:26:50Z")
When writing down the math behind multitaper, I read that the number of tapers L of is recommended to be \[1,2\]: L\<\<2 alpha -1, where alpha = 1/2 \* R \* T, with R: full frequency bandwidth, and alpha \>=1 \[1, eq. 22\]. Fr… --- ## [Different data and plots when reading the same edf file in mne, eeglab and edfbrowser](https://mne.discourse.group/t/different-data-and-plots-when-reading-the-same-edf-file-in-mne-eeglab-and-edfbrowser/6318)
**Author:** [@datalw](https://mne.discourse.group/u/datalw)\ **Replies:** 30\ **Last updated:** [August 12, 2026, 9:35am UTC](https://mne.discourse.group/t/different-data-and-plots-when-reading-the-same-edf-file-in-mne-eeglab-and-edfbrowser/6318 "2026-08-12T09:35:24Z")
MNE version: 1.1 operating system: Windows 11 Hi, I have read an edf file with mne, which contains also 3 bio channels. The plots of the bio channels have abnormal patterns. However, these abnormalties disappeared whe… --- ## [edfcore: TypeScript EDF/BDF reader for browser and Node.js](https://mne.discourse.group/t/edfcore-typescript-edf-bdf-reader-for-browser-and-node-js/11926)
**Author:** [@dadadada](https://mne.discourse.group/u/dadadada)\ **Replies:** 0\ **Last updated:** [August 12, 2026, 9:34am UTC](https://mne.discourse.group/t/edfcore-typescript-edf-bdf-reader-for-browser-and-node-js/11926 "2026-08-12T09:34:36Z")
Hi everyone! I recently released edfcore, an open-source, zero-dependency TypeScript library for reading EDF-family biosignal recordings directly in browser and Node.js applications. It supports EDF, EDF+, BDF, and BDF… --- ## [Unexpected increase in high-frequency power across many EEG channels in raw BioSemi PSD](https://mne.discourse.group/t/unexpected-increase-in-high-frequency-power-across-many-eeg-channels-in-raw-biosemi-psd/11921)
**Author:** [@omertzuk](https://mne.discourse.group/u/omertzuk)\ **Replies:** 2\ **Last updated:** [August 9, 2026, 5:57pm UTC](https://mne.discourse.group/t/unexpected-increase-in-high-frequency-power-across-many-eeg-channels-in-raw-biosemi-psd/11921 "2026-08-09T17:57:56Z")
Hi, I am inspecting the PSD of a raw BioSemi EEG recording before preprocessing. I expected an approximately decreasing 1/f-like spectrum, but many channels instead show increasing power at higher frequencies, particula… --- ## [Help us evaluate uncertainty visualizations for EEG topoplots](https://mne.discourse.group/t/help-us-evaluate-uncertainty-visualizations-for-eeg-topoplots/11911)
**Author:** [@vladdez](https://mne.discourse.group/u/vladdez)\ **Replies:** 1\ **Last updated:** [August 5, 2026, 11:51am UTC](https://mne.discourse.group/t/help-us-evaluate-uncertainty-visualizations-for-eeg-topoplots/11911 "2026-08-05T11:51:31Z")
Hello MNE community, We are conducting a research study at the University of Stuttgart on how uncertainty should be visualized in EEG topographic maps (topoplots). We are looking for researchers with experience interpre… --- ## [Should average reference be recomputed after post-ICA channel interpolation?](https://mne.discourse.group/t/should-average-reference-be-recomputed-after-post-ica-channel-interpolation/11905)
**Author:** [@lukas-fv](https://mne.discourse.group/u/lukas-fv)\ **Replies:** 5\ **Last updated:** [August 3, 2026, 6:17am UTC](https://mne.discourse.group/t/should-average-reference-be-recomputed-after-post-ica-channel-interpolation/11905 "2026-08-03T06:17:24Z")
Hi, I am preprocessing BioSemi 128-channel EEG data in MNE-Python for ERP and sensor-level spectral analyses. My pipeline is: Mark bad channels Average-reference excluding bads Fit/apply ICA on the good channels Inte… --- ## [EEG data format for BIDS – any limitations with EDF vs BrainVision/FIF?](https://mne.discourse.group/t/eeg-data-format-for-bids-any-limitations-with-edf-vs-brainvision-fif/11768)
**Author:** [@jsadoine](https://mne.discourse.group/u/jsadoine)\ **Replies:** 3\ **Last updated:** [August 3, 2026, 4:15am UTC](https://mne.discourse.group/t/eeg-data-format-for-bids-any-limitations-with-edf-vs-brainvision-fif/11768 "2026-08-03T04:15:08Z")
Hi everyone, I’m reaching out to get some community feedback on EEG data management, particularly around format choices for BIDS-compliant datasets. Our context: we are building a multimodal dataset (EEG, MRI, genetics… --- ## [EEG motor dataset, cannot see the expected reslts](https://mne.discourse.group/t/eeg-motor-dataset-cannot-see-the-expected-reslts/11896)
**Author:** [@gmj3](https://mne.discourse.group/u/gmj3)\ **Replies:** 22\ **Last updated:** [August 2, 2026, 7:51pm UTC](https://mne.discourse.group/t/eeg-motor-dataset-cannot-see-the-expected-reslts/11896 "2026-08-02T19:51:40Z")
:red\_question\_mark: If you have a question or issue with MNE-Python, please include the following info: MNE version: 11.0 operating system: Windows 11 So I tried analyzing data for all 109 participants in this dataset… --- ## [How to treat ocular artifacts for visual tasks](https://mne.discourse.group/t/how-to-treat-ocular-artifacts-for-visual-tasks/11901)
**Author:** [@djn8068](https://mne.discourse.group/u/djn8068)\ **Replies:** 6\ **Last updated:** [July 28, 2026, 2:19pm UTC](https://mne.discourse.group/t/how-to-treat-ocular-artifacts-for-visual-tasks/11901 "2026-07-28T14:19:00Z")
Hello everyone, I have been working on an MNE pipeline for MEG data, and I found something I wasn’t expecting when preprocessing the localizer data: if I removed ocular artifacts during the ICA step, the SNR of the data… --- ## [Pin GitHub Actions to full commit SHA to prevent supply chain attacks](https://mne.discourse.group/t/pin-github-actions-to-full-commit-sha-to-prevent-supply-chain-attacks/11821)
**Author:** [@Aniketsy](https://mne.discourse.group/u/Aniketsy)\ **Replies:** 1\ **Last updated:** [July 28, 2026, 10:11am UTC](https://mne.discourse.group/t/pin-github-actions-to-full-commit-sha-to-prevent-supply-chain-attacks/11821 "2026-07-28T10:11:31Z")
Hi, mne-python/.github/workflows/codeql-analysis.yml at main · mne-tools/mne-python · GitHub we are using mutable tags in our workflow, so i think we should update with full commit SHA, as this reduces a risk of suppl… --- ## [error when using create\_3d\_figure](https://mne.discourse.group/t/error-when-using-create-3d-figure/11902)
**Author:** [@cmelot](https://mne.discourse.group/u/cmelot)\ **Replies:** 3\ **Last updated:** [July 24, 2026, 5:14pm UTC](https://mne.discourse.group/t/error-when-using-create-3d-figure/11902 "2026-07-24T17:14:58Z")
Hello ! when I type in a Python3 console or in Spyder import mne fig\_roots = mne.viz.create\_3d\_figure(size=(600, 400), bgcolor=(0, 0, 0)) I get the following error Using pyvistaqt 3d backend. 2026-07-23 17:09:42.78… --- ## [Seeking Epileptologist for Independent Review of OpenNeuro EEG Recordings](https://mne.discourse.group/t/seeking-epileptologist-for-independent-review-of-openneuro-eeg-recordings/11875)
**Author:** [@smmtvm](https://mne.discourse.group/u/smmtvm)\ **Replies:** 2\ **Last updated:** [July 22, 2026, 12:25am UTC](https://mne.discourse.group/t/seeking-epileptologist-for-independent-review-of-openneuro-eeg-recordings/11875 "2026-07-22T00:25:38Z")
Hello We are conducting a research project using five de-identified OpenNeuro EEG recordings. We are looking for an experienced epileptologist or clinical EEG reader who would be interested in providing an independent r… --- ## [Pre-processing EEG for Spectral Analysis During Spontaneous Sweating Events](https://mne.discourse.group/t/pre-processing-eeg-for-spectral-analysis-during-spontaneous-sweating-events/11879)
**Author:** [@trnanhkit12](https://mne.discourse.group/u/trnanhkit12)\ **Replies:** 6\ **Last updated:** [July 20, 2026, 7:08am UTC](https://mne.discourse.group/t/pre-processing-eeg-for-spectral-analysis-during-spontaneous-sweating-events/11879 "2026-07-20T07:08:27Z")
Hello everyone, First of all, I’m new to the community but have been using MNE for EEG processing for the past few months. The tool has been fantastic! Anyway, I’m seeking some advice for how to pre-process the 16-chann… --- ## [How to go around bug in how MNE interacts with matplotlib?](https://mne.discourse.group/t/how-to-go-around-bug-in-how-mne-interacts-with-matplotlib/11891)
**Author:** [@A\_Portier](https://mne.discourse.group/u/A_Portier)\ **Replies:** 1\ **Last updated:** [July 16, 2026, 5:00am UTC](https://mne.discourse.group/t/how-to-go-around-bug-in-how-mne-interacts-with-matplotlib/11891 "2026-07-16T05:00:39Z")
Hello! I’m doing some source reconstruction, so eventually I plot the SourceEstimate object I get, in the usual way. By default, for this kind of plots, MNE uses pyvistaqt as the default backend. However, when I do that… [Next page](https://mne.discourse.group/c/support-discussions/6.md?page=1)