Hi Tony,
the FFT describes a further step. You're right, that there is no connection. I mentioned it only to reason my request. Sorry about the confusion. In the rotation matrix there are informations in form of angles. I would like to extract the angles which describe rotation of the x, y and z axis. I thought maybe, that SimMechanics uses a specific decomposition like Z-X-Z with regards to Euler angles. If I got your point, this decomposition depends on me. If I choose a "wrong" decomposition, does it change my three angles?
Thank you, for helping me.
Martin