delta.x, delta.t and delta.v
(displacements and instantaneous velocity), totalTime, totalDistance,
distStartToEnd, curvilinearVelocity, straightLineVelocity and
linearityForwardProgression, Mean Squared Displacement, velocity
autocorrelation, and moreextractKinematics.traj(trajectoryset, trajectoryID, acquisitionFrequency = 30,
scala = 50)TrajectorySet objectKinematicsFeatures object