nm000298 NEMAR-native dataset

WRCC2023_MI_B: Three-class motor imagery dataset (MI-B) of the BCI competition WRCC2023

Three-class motor imagery EEG dataset (MI-B) from the BCI competition at the 2023 World Robot Contest (WRCC2023). It contains recordings from nine subjects, two of them stroke patients and seven healthy, performing cued imagery of left hand, right hand and feet movements (30 trials per class). Signals were recorded with a 59-channel Neuracle EEG system at 1000 Hz and re-released in BIDS format via MOABB.

EEG

Issues GitHub

Download this dataset

Pick a method. Large datasets skip the zip and use the streaming methods below — all resumable. Full download guide →

Download archive (.zip) — 1.6 GB
A single zip of the published version. Best for small/medium datasets.

Download zip
NEMAR CLI recommended
Pulls the pinned version + annexed data and resumes cleanly. Install nemar-cli →
```
nemar dataset download nm000298
```

DataLad

Clone the dataset repo and fetch file content on demand. Docs →

datalad clone https://github.com/nemarDatasets/nm000298 nm000298
cd nm000298 && datalad get .

git-annex

Plain git + git-annex against the dataset repo. Docs →

git clone https://github.com/nemarDatasets/nm000298 nm000298
cd nm000298 && git annex get .

Direct files (wget / curl / rclone)
Every file with a stable, range-resumable URL from the manifest. Needs curl, jq, wget (or rclone/aria2c). Docs →
```
curl -s https://data.nemar.org/nm000298/v1.0.0/manifest.json | jq -r '.[].bytes_url' > urls.txt
wget -xc -i urls.txt
```

Compute on this dataset

Two routes today, with a third (in-browser one-click submission) landing soon.

NeuroScience Gateway (NSG) portal.
NSG runs EEGLAB / Brainstorm / MNE pipelines on supercomputing time donated by SDSC. Create an account, point a job at this dataset's S3 prefix (s3://nemar/nm000298), and submit.
nsgportal.org →
Local processing with nemar-cli.
Pull the dataset to your machine and run any toolbox locally. Honors the published version pinning.
```
npm install -g nemar-cli
nemar dataset clone nm000298
cd nm000298 && nemar dataset get
```
Just the files.
rclone, aria2c, or any HTTPS client works against data.nemar.org/nm000298/ — the manifest carries presigned S3 URLs.

Direct compute access is coming soon. One-click NSG submission from this page is scoped for a follow-up phase. Tracked on nemarOrg/website#6.

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Files

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How to use the data (for agentic research) license, citation, download commands

What it is

Modalities: EEG
Participants: 9
Size: 1.80 GB
Tasks: imagery
HED version: 8.4.0

License and terms

License: CC0-1.0
Recommended citation: WRCC2023 (2026). WRCC2023_MI_B: Three-class motor imagery dataset (MI-B) of the BCI competition WRCC2023 (Version v1.0.0) [Data set]. NEMAR. https://doi.org/10.82901/nemar.nm000298
Reference 1: https://doi.org/10.21105/joss.01896
Reference 2: https://doi.org/10.1038/s41597-019-0104-8

Where the bytes are

Latest version (always current): https://data.nemar.org/nm000298/latest/
This version (v1.0.0): https://data.nemar.org/nm000298/v1.0.0/

How to download

The dataset: nemar dataset download nm000298 Clones and fetches in one step. Content under stimuli/ and derivatives/ is skipped by default because those trees can be large; add --stimuli --derivatives for the whole thing.
A subset, one step: nemar dataset download nm000298 --subjects sub-01,02 Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
A subset, step 1: nemar dataset clone nm000298 Clones git-annex pointers only; fetches no file content. Creates ./nm000298.
A subset, step 2: cd nm000298 The get command below reads the clone's annex, so it only works from inside the clone.
A subset, step 3: nemar dataset get <files> Pulls the files you actually need. Skips stimuli/ and derivatives/ unless the path you ask for is under one of them.
One small file: https://data.nemar.org/nm000298/v1.0.0/participants.tsv A direct HTTPS fetch works for any single file.

Assess fit without downloading

Participants table: https://data.nemar.org/nm000298/v1.0.0/participants.tsv
Dataset description: https://data.nemar.org/nm000298/v1.0.0/dataset_description.json
Directory listing: https://data.nemar.org/nm000298/v1.0.0/?format=json
Catalog record: https://api.nemar.org/datasets/nm000298