expdrift_onset: Drift onset time of the exponential-drift model

In mnirs: Muscle Near-Infrared Spectroscopy Processing and Analysis

Drift onset time of the exponential-drift model

Description

The time at which a monoexponential response reaches the drift_fraction fraction of its amplitude, by the analytic inverse TD - tau * log(1 - drift_fraction) (see exponential_drift()).

Usage

expdrift_onset(tau, drift_fraction, TD = NULL)

Arguments

tau	A numeric parameter for the time constant (\tau) of the exponential response, in units of the predictor variable t.
drift_fraction	A numeric fraction of the primary amplitude B - A in ⁠(0.5, 1)⁠ at which the linear drift begins, where the primary response reaches A + drift_fraction * (B - A).
TD	A numeric parameter for the time delay before the onset of the exponential response, in units of the predictor variable t. If NULL (default), a 3-parameter model without time delay is used.

Value

A numeric vector of onset times, TD = 0 when NULL.

mnirs documentation built on Sept. 13, 2026, 1:06 a.m.