Hi Allison,
Based on these answers and other examples and toolboxes I saw, it seems that there is no need to arrange the forces, COP and moments into 18 columns for right and left foot. If you have 4 force plates, you can have a MOT file with 37 columns (1+4*9). Then, in the External loads section, assign two force plate for right and two for left foot. This is what this toolbox do:
https://simtk.org/projects/c3d2opensim_btk/
Hope this help,
Regards
Mohammadreza
force mot file
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Mohammadreza Rezaie
- Posts: 408
- Joined: Fri Nov 24, 2017 12:48 am
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Allison Porter
- Posts: 12
- Joined: Thu Jan 10, 2019 3:53 pm
Re: force mot file
Hi Mohammadreza,
Thank you for the response, I will look into this toolbox! I received the data as csv from the group that originally collected the data, do you know if this toolbox only works for c3d files, or will csv work too?
Best,
Allison
Thank you for the response, I will look into this toolbox! I received the data as csv from the group that originally collected the data, do you know if this toolbox only works for c3d files, or will csv work too?
Best,
Allison
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Mohammadreza Rezaie
- Posts: 408
- Joined: Fri Nov 24, 2017 12:48 am
Re: force mot file
Hi Allison,
Your are lucky. Try this toolbox:
https://simtk.org/projects/c3d2opensim
Regards
Mohammadreza
Your are lucky. Try this toolbox:
https://simtk.org/projects/c3d2opensim
Regards
Mohammadreza
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Allison Porter
- Posts: 12
- Joined: Thu Jan 10, 2019 3:53 pm
Re: force mot file
Hi Mohammadreza,
Thanks for sending along that second toolbox. It appears that the download page doesn't include a vital function, and that many people have not been able to use it for that reason.
If I have the data in csv format already, I think I can convert the data manually. But in your first message, you mentioned that I can have a MOT file with 37 columns (1+4*9). Then, in the External loads section, assign two force plate for right and two for left foot. Would the MOT file have be formatted so that the time column is first, then all 9 columns for plate one, then all 9 for plate 2, etc? When you say: "in the External loads section, assign two force plate for right and two for left foot", do you mean in the External Loads section of the OpenSim GUI for Inverse Dynamics etc. ?
Best,
Allison
Thanks for sending along that second toolbox. It appears that the download page doesn't include a vital function, and that many people have not been able to use it for that reason.
If I have the data in csv format already, I think I can convert the data manually. But in your first message, you mentioned that I can have a MOT file with 37 columns (1+4*9). Then, in the External loads section, assign two force plate for right and two for left foot. Would the MOT file have be formatted so that the time column is first, then all 9 columns for plate one, then all 9 for plate 2, etc? When you say: "in the External loads section, assign two force plate for right and two for left foot", do you mean in the External Loads section of the OpenSim GUI for Inverse Dynamics etc. ?
Best,
Allison
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Mohammadreza Rezaie
- Posts: 408
- Joined: Fri Nov 24, 2017 12:48 am
Re: force mot file
Hi,
I couldn't understand your problem with the second toolbox. There was a MSWORD tutorial file in the download part named "Documentation Links": https://simtk.org/frs/?group_id=1019
It had sample files too.
About the external load file; I attached a sample of 3 force plate. It can be created in ID, RRA, CMC, SO, Analyze and FD tools. Once you create it, you can use it for other tools.
Hope it helps.
Regards,
Mohammadreza
I couldn't understand your problem with the second toolbox. There was a MSWORD tutorial file in the download part named "Documentation Links": https://simtk.org/frs/?group_id=1019
It had sample files too.
About the external load file; I attached a sample of 3 force plate. It can be created in ID, RRA, CMC, SO, Analyze and FD tools. Once you create it, you can use it for other tools.
Hope it helps.
Regards,
Mohammadreza