analyse_countermovement_jump
                        Analyse a countermovement jump
capability_json         What this surface can be asked to do
describe                The account a number gives of itself
pf_acquisition          What the plate and its settings were
pf_acquisition_members
                        The members the acquisition block declares
pf_bindings             The rules available for each step
pf_entry                One registry entry
pf_force                The force trace a trial holds
pf_plate                One plate, saved here or stated from its
                        members
pf_plate_forget         Remove a saved plate
pf_plate_save           Record a plate's settings
pf_plates               Every plate this machine holds
pf_read_force_file      Read a force file
pf_registry             Load the method registry
pf_signals              The signals raised over one analysis
pf_spread               How far the method choice moves one number
pf_trial                Build a trial from a force vector
pf_value                One quantity out of an analysis
pf_version              The version of this package
plateforce_refusal      Refusals
