User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Reference IV-5
CX1 USER GUIDE - COMPLETE.doc 26/04/04 155/162
Derived data - automatic:
Velocity Velocity data for all acquired markers, calculated from the
(interpolated
[X,Y,Z] (m/s) and filtered) position data. Further filtering may be applied (see
Setup: Data Filters...)
Velocity Magnitude Velocity magnitude data for all acquired markers, calculated from
the (m/s) above velocity data.
Acceleration Acceleration data for all acquired markers, calculated from the
[X,Y,Z] (m/s²) filtered velocity data. Further filtering may be applied (see Setup:
Data Filters...)
The names and plot-colours associated with Velocity and
Acceleration data are the same as for the Marker Position data.
Acceleration Magnitude Acceleration magnitude data for all acquired markers, calculated
(m/s²) from the above acceleration data.
Force Vector Position The coordinates of the top and bottom of the reaction force vector,
[X,Y,Z] (mm) calculated from force-plate data.
The offset of the force-plate centre(s) from the Coda coordinate
origin is defined in the Codasys.cfg configuration file.
Force Vector position data is used to draw a Force vector on the
Stick-figure View, and to calculate the Moments for any (user)
defined Joints.
The names and plot-colours associated with Force Vector position
data are assigned automatically.
Derived data - configurable:
Virtual Marker Position The (x,y,z) coordinates of any Virtual Markers which have been
[X,Y,Z] (mm) defined in the Setup (Setup: Define Virtual Markers...).
If Filtering and/or Interpolation is on (Setup: Data Filers...), the
coordinates of Virtual Markers are calculated from the filtered and/or
interpolated real Marker positions.
The names and plot-colours associated with Virtual Marker Position
data is defined in the Setup: Define Virtual Markers... dialogue.
Virtual Markers can be used in the definitions of Stick-figure joins,
Rigid Bodies, and Vector Angles - they appear in the Marker lists as
markers with negative indices.
Virtual Marker Vel. Velocity data for all Virtual Markers, calculated from the position
data.
[X,Y,Z] (m/s)
Virtual Marker Acc. Acceleration data for all Virtual Markers, calculated from the
velocities.
[X,Y,Z] (m/s²)
The names and plot-colours associated with Virtual Marker Velocity
and Acceleration data are the same as for the Position data.
Joint Angle (degrees) Angle data for any angles which have been defined in the Setup
(Setup: Define Joints...)