Extract heart-rate fragmentation features

Computes dependency-light heart-rate fragmentation descriptors from IBI/RR intervals. Metrics include percentage of inflection points (PIP), inverse average segment length (IALS), percentage of short segments (PSS), percentage of alternation segments (PAS), and long/short segment summaries.

Usage

extract_gazepoint_hrv_fragmentation(
  dat,
  ibi_col = "IBI",
  group_cols = NULL,
  zero_tolerance = 0,
  short_segment_length = 3
)

Arguments

dat

A data frame containing IBI/RR intervals.

ibi_col

Numeric IBI/RR interval column.

group_cols

Optional grouping columns.

zero_tolerance

Absolute change below which interval differences are treated as zero.

short_segment_length

Maximum segment length counted as short.

Value

A list with overview, features, and settings.

Details

These are fragmentation descriptors of interbeat interval dynamics. They should not be interpreted as clinical diagnoses or direct autonomic-state labels by themselves.