The WY function returns the y-component of the difference between the angular velocity vector of marker i in ground and the angular velocity vector of marker j in ground, and expressed in the coordinate system of marker k. Marker j defaults to the global coordinate system if it is not specified. Similarly, marker k defaults to the global coordinate system if it is not specified.
WY(i[,j][,k])
| 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. |
| k | The marker in whose coordinate system the velocity vector is being expressed. Set k = 0 if you want the results to be calculated along the y-axis of the global coordinate system. |
Mathematically, WY is calculated as follows:
WY(1236,2169,2169)
This function returns the y-component of the angular velocity Markers 1236 and 2169 as measured in the coordinate system of Marker 2169.