The WM function returns the magnitude of the angular velocity vector of marker i with respect to marker j. Marker j defaults to the global coordinate system if it is not specified.
WM(i[,j])
| i | The marker whose velocity is being measured. |
| j | The marker with respect to which the velocity is being measured. Set j = 0, while still specifying l, if you want j to default to the global coordinate system. |
Mathematically, WM is calculated as follows:
WM(1236,2169)
This function returns the magnitude of the angular velocity vector of Marker 1236 and Marker 2169.