Would anyone be able to help me extract in MATLAB all the information (translation and rotation) concerning local reference system with respect to ground reference system? I need this information to build my OpenSim's model in Abaqus.
To find the translation of local reference system for each joints, I'm using the coordinates returned by Joint reaction Analysis.
Regarding axis rotation I'm encountering some difficulties.
In this example I have the joint between L5 and S1 and directly in OpenSim I can see the translation and rotation about the reference system of sacrum with respect to reference system of lumbar5. But I would need the position of sacrum reference system with respect to the ground reference system. Is there a function in Matlab with which I can extract this information?
The second question is: The rotation of the axe4s of local reference system with respect to another in what order is performed?
Thamks in advance
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