move figshare_30740115 into data/figshare/

data/figshare/figshare_30740115/README.md

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+# figshare_30740115 — Figshare 30740115
+
+Part of the **Amber** EEG corpus. Converted to the EEGX container format; see `SPEC.md` at the repository root.
+
+## Source
+
+| | |
+|---|---|
+| Archive | Other sources |
+| Original dataset | Figshare 30740115 |
+| Homepage | https://figshare.com/articles/dataset/An_Electroencephalogram_Dataset_of_Learner_Interest_States_in_Online_Education_Tasks/30740115 |
+| License | CC BY 4.0 |
+| Source format | set |
+
+## Contents
+
+| | |
+|---|---|
+| Recordings | 1 |
+| Files | 1 |
+| Subjects | 1 |
+| Recording hours | 0.20 |
+| EEG channel-hours | 3.2 |
+| Sample rate (Hz) | 250 |
+| Channels per file | 16 |
+| Annotated events | 716 |
+| Stored size | 0.005 GB |
+| Fidelity | requantised (see below) |
+
+Channel types present: eeg ×16.
+
+## Reading
+
+```python
+import eegx
+r = eegx.open('data/other/figshare_30740115/<file>.eegx')
+x = r.read()                  # (n_channels, n_samples) float32, physical units
+x = r.read(picks=['eeg'])     # EEG channels only
+print(r.sfreq, r.channel_names, r.events)
+```
+
+## Provenance
+
+Every `.eegx` file carries a `provenance` block in its header with the exact source URL, the SHA-256 of the original file, the license, and the conversion timestamp. Nothing here is detached from where it came from:
+
+```python
+eegx.read_header(path)['provenance']
+```

data/figshare/figshare_30740115/eeglab_data.eegx

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+version https://git-lfs.github.com/spec/v1
+oid sha256:661b715a71b3aa7e00859ee5edf157021a7897144be2469fb1f31e609ef8e595
+size 5157496