64 lines
3.1 KiB
Markdown
64 lines
3.1 KiB
Markdown
## Overview
|
||
|
||
- Data source: `SingleRecordings/<id>/{hr.csv, rr.csv, timestamps.csv}`
|
||
- Scripts:
|
||
- `plot_meditation_data.py`: per-recording plots (raw + moving averages + segment boxplots)
|
||
- `aggregate_segments_analysis.py`: aggregate metrics/plots across recordings with exactly 4 marks (conditions)
|
||
|
||
# Results
|
||
|
||
| Condition | HR (bpm) | RR (ms) | RMSSD (ms) |
|
||
|-------------------|----------|---------|------------|
|
||
| Breathing Scene 1 | 72.61 | 843.33 | 52.70 |
|
||
| Spring Scene | 72.33 | 860.78 | 56.95 |
|
||
| Summer Scene | 72.50 | 862.00 | 41.15 |
|
||
| Autumn Scene | 72.89 | 850.44 | 41.89 |
|
||
| Breathing Scene 2 | 73.78 | 839.94 | 42.59 |
|
||
|
||
## Plots
|
||
|
||
### Aggregate Boxplots
|
||
|
||
|
||
|
||
|
||
|
||
### Aligned Average Curves
|
||
|
||
|
||
|
||
|
||
|
||
## How calculations are done
|
||
|
||
- HR and RR loading
|
||
- Read `timestamp` (ms) → convert to datetime; set as index.
|
||
- HR column: `hr` (beats per minute). RR column: `rr_ms` (milliseconds).
|
||
|
||
- Moving averages (per recording)
|
||
- Time-based rolling means over irregular timestamps using windows: 5 s, 10 s, 30 s, 60 s.
|
||
- X-axis is seconds from each recording’s start.
|
||
|
||
- Mark handling (per recording)
|
||
- Vertical lines at marks from `timestamps.csv`.
|
||
- Segment boxplots use values in: each interval between consecutive marks and the final interval (last mark → end).
|
||
|
||
- RMSSD (HRV)
|
||
- Definition: RMSSD = sqrt(mean(diff(RR_ms)^2)) using successive RR intervals (ms).
|
||
- Aggregate per-condition RMSSD: computed over all RR samples within each condition’s time window (recording-level); requires ≥2 RR samples.
|
||
- Aligned time-series RMSSD: first compute a 30 s time-based rolling RMSSD per recording, then align and average across recordings (see below).
|
||
|
||
- Aggregate metrics across recordings (exactly 4 marks)
|
||
- Conditions (English labels):
|
||
- Breathing Scene 1 (pre-first mark)
|
||
- Spring Scene (1st–2nd mark)
|
||
- Summer Scene (2nd–3rd mark)
|
||
- Autumn Scene (3rd–4th mark)
|
||
- Breathing Scene 2 (post-last mark)
|
||
- Per recording: compute medians for HR and RR within each condition; compute RMSSD within each condition.
|
||
- Summary CSV aggregates these per-recording values; boxplots show distributions. The mean of each condition is marked by a black dot on the boxplots.
|
||
|
||
- Aligned average curves (HR, RR, RMSSD)
|
||
- Only recordings with exactly 4 marks are used.
|
||
- For each recording, durations of the five segments are measured; median segment proportions across recordings define a normalized 0–1 time axis with aligned boundaries.
|
||
- Each recording’s series is piecewise-linearly time-normalized to this axis, interpolated to a common grid, and then averaged (mean ± 1 SD). For RMSSD, a 30 s rolling RMSSD is used before alignment. |