User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Reference IV-2
CX1 USER GUIDE - COMPLETE.doc 26/04/04 140/162
65 Calculated VectorAngVels (deg/s * res
-1
) nVAngles [n] int16 (2)
66 Calculated VectorAngAcc (deg/s
2
* res
-1
) nVAngles [n] int16 (2)
67 Calculated 2D JointMoments (Nm * res
-1
) nJoints [n] int16 (2)
68 Calculated (2D) JointPowers (W * res
-1
) nJoints [n] int16 (2)
69 Calculated Segment Ref.Points (m * res
-1
) nPoints [n] int16[3] (6) [ X, Y, Z ]
70 Calculated Segment Rotations (deg * res
-1
) nJoints [n] int16[3] (6) [ α, β, γ ]
71 Calculated Joint Centre Vel. (m/s * res
-1
) nJCentre [n] int16[3] (6) [ X, Y, Z ]
72 Calculated Joint Centre Acc. (m/s
2
* res
-1
) nJCentre [n] int16[3] (6) [ X, Y, Z ]
73 Calculated Segment EVB.x (res
-1
) nSegment [n] int16[3] (6) [ X, Y, Z ]
74 Calculated Segment EVB.y (res
-1
) nSegment [n] int16[3] (6) [ X, Y, Z ]
75 Calculated Segment EVB.z (res
-1
) nSegment [n] int16[3] (6) [ X, Y, Z ]
76 Calculated Segment Ang. Vel. (rad/s * res
-1
) nSegment [n] int16[3] (6) [ X, Y, Z ]
77 Calculated Segment Ang. Acc. (rad/s
2
* res
-1
) nSegment [n] int16[3] (6) [ X, Y, Z ]
78 Calculated 3D Joint Rot.Vel. (rad/s * res
-1
) nJoints [n] int16[3] (6) [ α, β, γ ]
79 Calculated 3D Joint Moment (Nm/kg * res
-1
) nJoints [n] int16[3] (6) [ α, β, γ ]
80 Calculated (3D) Joint Power (W/kg * res
-1
) nJoints [n] int16 (2)
Where:
nChars = 1....n : number of characters in Comment View + 1, including <CR> & <LF>s.
nMarkers = 1...28 ( typ. 6) : number of markers used during acquisition
nEpochs = 1...8000 ( typ. 800) : number of samples of marker data acquired
nForce = 0, 8, 16 : number of raw force-plate channels acquired (8 per force plate)
nEMG = 0, 8, 16 : number of EMG channels acquired (8 per EMG system)
nEvent = 0 or 16 : not used in mpx-30 or cx1 systems; may be present in old CODA-B/C files.
nBars = 0...n ( typ. 0,1 or 2) : number of drop-bars displayed on graphs.
nCycles = 0, 2... : number of Gait cycles defined.
Values are quoted for MDF files acquired from a CODA mpx-30 system with Motion Analysis version 1.x.
For data acquired from CODA-3 systems (CODA-B/C files saved in MDF format), the values are:
nMarkers = 12 (not all marker data will be valid; invalid markers will be flagged in the flag data)
nEpochs = 884 (4.4s @ 200Hz)
nForce = 8 (0 in CODA-B files)
nEMG = 8 (0 in CODA-B files)
nEvent = 16
m.resolution : the resolution of marker position data, stored in data type 13 for each marker.
f.resolution : the resolution of force data, currently fixed at 50mN per integer unit.
e.resolution : the resolution of EMG data, currently fixed at 1.84nV per integer unit.
Calculated data:
nVariables = total number of calculated data variable arrays stored in the data section.
nAngles = number of Angles for which data is stored (equal to the number defined in the Setup).
nLengths = number of Lengths for which data is stored (number of stick-figure joins).
nVAngles = number of Vector Angles...
nAnalogue = number of Analogue data channels (raw force channels)...
nPoints = number of anatomical reference points.
nJoints = number of anatomical joints...
If the number of data arrays for any data type is zero, then there is no header entry for that data type.