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Compute Instantaneous Heart Rate from R-Peak Indices

Source: R/compute_hr_signal.R
compute_hr_signal.Rd

Converts R-peak sample indices (from detect_qrs()) into a sample-by-sample instantaneous heart rate trace by filling each inter-beat interval with the constant HR derived from that interval's length.

Usage

compute_hr_signal(qrs)

Arguments

qrs

A mrpheus_qrs object from detect_qrs(), or a named list with at least qrs_i (integer vector of R-peak indices) and fs (sampling frequency in Hz).

Value

Numeric vector of length max(qrs$qrs_i). Each sample contains the instantaneous heart rate in beats per minute for the inter-beat interval it falls within. Samples before the first detected R-peak are 0.

See also

detect_qrs(), compute_hrv_sleep()

Examples

if (FALSE) { # \dontrun{
rec <- read_philips_physlog("sub-01_physlog.log")
qrs <- detect_qrs(rec$C[, "v1raw"], fs = rec$HDR$sfreq)
hr  <- compute_hr_signal(qrs)

plot(seq_along(hr) / rec$HDR$sfreq, hr, type = "l",
     xlab = "Time (s)", ylab = "HR (bpm)")
} # }