Estimate posterior temporal derivatives of a pupil trajectory

Computes finite-difference posterior derivatives on the prediction grid. This is a descriptive functional estimand: it does not automatically define physiological onset, changepoints, or cognitively meaningful phases.

Usage

estimate_pupil_trajectory_derivative(
  prediction,
  order = 1L,
  probability = 0.95
)

Arguments

prediction

A gp3bayes_pupil_advanced_trajectory object.

order

Derivative order, 1 (velocity/slope) or 2 (acceleration/curvature).

probability

Central posterior interval probability.

Value

A gp3bayes_pupil_trajectory_derivative object.