Compute jerk from position data — computeJerk • PhysioMoCap

Computes jerk (third derivative of position) from position assays.

Usage

computeJerk(pe, method = "central", sampling_rate = NULL)

Arguments

pe: A PhysioExperiment object containing position assays.
method: Finite difference method: "central" (default), "forward", or "backward".
sampling_rate: Sampling rate in Hz. If NULL (default), uses samplingRate(pe).

Value

PhysioExperiment with new jerk_x, jerk_y, jerk_z assays added.

References

Winter DA (2009). "Biomechanics and Motor Control of Human Movement." 4th ed. John Wiley & Sons.

See also

computeAcceleration() for second-order derivatives, computeVelocity() for first-order derivatives, differentiate() for general-purpose numerical differentiation.

Examples

if (FALSE) { # \dontrun{
pe <- make_mocap_markers(n_time = 100, n_markers = 4, sr = 120)
pe <- computeJerk(pe)
} # }