tdmetrics¶

Compute time-domain HRV metrics from interval series.

Syntax¶

function metrics = tdmetrics(dtk)

Description¶

METRICS = TDMETRICS(DTK) computes standard time-domain heart-rate variability metrics from the interval series DTK, expressed in seconds.

DTK must be a non-empty numeric vector. Positive finite values are treated as valid intervals. NaN values are allowed as missing-interval markers and are omitted before computing the metrics. Inf, zero and negative values are rejected.

METRICS is a structure with fields: mhr - Mean heart rate in beats per minute. sdnn - Standard deviation of intervals in milliseconds. sdsd - Standard deviation of successive interval differences in ms. rmssd - Root mean square of successive interval differences in ms. pnn50 - Percentage of successive interval differences greater than 50 ms.

Source Code¶

View source code

Examples¶

dtk = [0.80 0.82 NaN 0.79 0.81];
metrics = tdmetrics(dtk);

View detailed example

See Also¶

• PANTOMPKINS

• API Reference

Module: HRV | Last Updated: 2026-07-09