The maximum marker error is literally just the distance between the OpenSim marker and the actual marker, correct? To try and troubleshoot some more, I put a new temporary marker in the GUI and aligned it with the associated marker on the thigh. I then took the coordinates of each and found the dist...

Thanks for the suggestions. I played around with the weights a bit and one of the two following things happens: the gait gets really wonky looking, or the gait pattern doesn't change much visibly and the max error either stays about the same or goes up. I also checked to make sure my scaling didn't ...

Hello All, I feel as though this is a silly question because I have seen the answer to it right in the OpenSim documentation, but my results don't appear to match that representation. I know that for IK, the documentation states that the maximum marker and coordinate errors are given in meters and d...

Hi Tom,

Thanks for following up. I had already contacted Ajay and he was aware of the problem so he's going to help me out and see if there's a way to get the fix to me. I really appreciate your diligence and quick responses to all these questions.

Thanks again!
Kathleen

Thanks Tom. I will take a look at those references again and see if there's any insight on what exactly that plugin does and take a look at the code you provided. Again, I really appreciate your help and insight on all of these questions I've had.

Kathleen

Good morning Tom, Thanks so much for your insight. I am familiar with their paper and the webinar, and will go back through to see if there is any insight, but since they were not concerned with muscles when they were creating their model, I don't think there will be any additional information there...

Hi Tom, I am indeed using 3.3... I've attached a zip file that has the model, the IK results (essentially the same as in the download file) and my setup file. I've been using 8-8.5 seconds because the lateral deltoid in that region is not wrapping around anything. The lateral deltoid is the muscle I...

I haven't had any luck getting any muscles or any point in the simulation to work (I've looked at all of the muscles over very short time lengths and only at the single coordinate (shoulder elevation) which I'm most interested in), especially at time lengths in which wrapping is not being used and i...

Hi Tom, Thanks for that troubleshooting advice. I'll try those methods and see if I can get it to run at any point for any muscles. I do have another question though about this... aren't the moment arms necessary for completing static optimization? What is it using for static optimization if it can'...

Hi all, I think this will probably be a pretty simple solution here, but I can't get it to work and I can't find much documentation on the Muscle Analysis protocol in the OpenSim user guide (maybe you could direct me to where that is if it exists). But all I want to do is find my moment arms of a ha...