| --- |
| license: apache-2.0 |
| task_categories: |
| - robotics |
| tags: |
| - tsfile |
| - timeseries |
| - time-series |
| - LeRobot |
| - emg |
| - electromyography |
| - sensor |
| pretty_name: Forearm EMG Sensor Dataset (TsFile) |
| size_categories: |
| - 100K<n<1M |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/anaselkhabbaz_sensor_dataset.tsfile |
| --- |
| |
| # Forearm EMG Sensor Dataset (TsFile) |
|
|
| Apache TsFile version of [`AnasElkhabbaz/sensor_dataset`](https://huggingface.co/datasets/AnasElkhabbaz/sensor_dataset). |
|
|
| ## Overview |
|
|
| Surface electromyography (EMG) recordings of the forearm, packaged in the |
| LeRobot v2.1 layout (`robot_type = None`). Each episode is one resting-state |
| recording trial of a subject, sampling three forearm muscle sensors over time. |
|
|
| - **Episodes:** 32 recording trials. |
| - **Frames:** 152,837 timesteps total, sampled at **~3.33 Hz** (each trial ≈ 1500 s). |
| - **Tasks:** 32, one per episode — each labelled `<Subject>_<Sex>_<N>_Rest` |
| (e.g. `Billy_Male_1_Rest`). `task_index` equals `episode_index`. |
| - **Sensors:** 3 forearm EMG channels — brachioradialis, flexor_carpi_radialis, |
| flexor_carpi_ulnaris. |
| - **Source format:** LeRobot v2.1 (no action and no video columns). |
|
|
| ## Schema (TsFile structure) |
|
|
| - **Time** (INT64, milliseconds) — per-frame timestamp, restarts at 0 for each |
| episode (`round(timestamp * 1000)`; ~300 ms apart at 3.33 Hz). |
| - **episode_index** (TAG) — trial id (0–31). Query one trial with |
| `WHERE episode_index=0`. |
| - **task_index** (TAG) — task id (equals `episode_index`); maps to the subject / |
| trial label in `meta/tasks.jsonl`. |
| - **frame_index** (FIELD, INT64) — frame number within the episode. |
| - **sample_index** (FIELD, INT64) — the source global `index` column. |
| - **observation_state_0** (FIELD, FLOAT) — brachioradialis EMG. |
| - **observation_state_1** (FIELD, FLOAT) — flexor_carpi_radialis EMG. |
| - **observation_state_2** (FIELD, FLOAT) — flexor_carpi_ulnaris EMG. |
|
|
| The source `timestamp` column is dropped because it equals `Time / 1000`. |
|
|
| ## Usage |
|
|
| Read the `.tsfile` file with the Apache TsFile Java or Python SDK. |
|
|
| ```python |
| # pip install tsfile |
| from tsfile import TsFileReader |
| reader = TsFileReader("data/anaselkhabbaz_sensor_dataset.tsfile") |
| # query one trial: WHERE episode_index=0 |
| ``` |
|
|
| ## Source & license |
|
|
| - Original dataset: https://huggingface.co/datasets/AnasElkhabbaz/sensor_dataset |
| - Author / publisher: AnasElkhabbaz |
| - License: Apache-2.0 (inherited from the original dataset) |
| |
