systole.hrv.nnX#
- systole.hrv.nnX(rr: Union[List, ndarray], t: int = 50, input_type: str = 'rr_ms') int[source]#
Number of difference in successive R-R interval > t ms.
- Parameters
- rr
R-R interval time-series, peaks or peaks index vectors. The default expected vector is R-R intervals in milliseconds. Other data format can be provided by specifying the “input_type” (can be “rr_s”, “peaks” or “peaks_idx”).
- t
Threshold value: Defaut is set to 50 ms to calculate the nn50 index.
- input_type
The type of input provided. Can be “peaks”, “peaks_idx”, “rr_ms” or “rr_s”. Defaults to “rr_ms”.
- Returns
- nnX
The number of successive differences larger than a value.