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Hi there

MOtoNMS dynamic elaboration outputs a .mot file which, according to the User manual has force information.
When looking at the input requirements for the IK and ID analysis in OpenSim it explains that each requires a .mot file.

The .mot file that the IK requires is called in the setup_IK.xml file and explained as follows:
The <coordinate_file> property specifies a .mot file containing experimental coordinate values (e.g., joint angles computed using anatomical reference frames) for this trial.

The .mot file that the ID requires is uploaded through the user interface and described as follows:
Subject01_walk1_grf.mot: The Force data file specified at the top of this dialogue window is a .mot or .sto file containing experimental data.

Are these two .mot files the same, as in, are they both the output from the MOtoNMS dynamic elaboration step, or is there an intermediate process to separate the grf and joint angles in two different .mot files?

Thank you for your help!

Regards,
Julian

Dear Julian,

MOtoNMS does not provide joint angles for the IK.
As reported in the OpenSim Documentation (http://simtk-confluence.stanford.edu:80 ... t%29+Files), they are optional data:

Representing Joint Angles in a .mot File
Optionally, if joint angles have been computed previously using other software, they may be imported into OpenSim in addition to marker data. The joint angles must be provided in a .sto or .mot file [...]

MOtoNMS outputs the .mot files required to generate simulations (point 2 at the following link of OpenSim documentation: http://simtk-confluence.stanford.edu:80 ... +Your+Data).

For additional details, you can also refer to MOtoNMS User Manual (http://rehabenggroup.github.io/MOtoNMS/) or to our publication: https://scfbm.biomedcentral.com/article ... 015-0044-4.

Hope it is clear now.
Best regards,
Alice

Dear Alice

Thank you very much, that explains it.

Kind regards,
Julian