Hi Spencer, I'm not sure which model of the lower limb you are using, but many models include a knee joint that is composed of n rotational dof's and two splines (ant/post and superior/inferior) coupled to the flexion or first rotation of the knee. The combination of free rotation and coupled spline...

Hey Ursula, I would be careful using Matlab to parse, edit, compile xml's for execution in OpenSim. I don't know the exact reason for this, but OpenSim does not provide a grammar for the xml's it uses, so you are guessing a bit when you edit/create them. This leads to problems with command line exec...

Hi,

Check that your system path includes the OpenSim bin (where the .dll's are located).

The path will be ('Where you installed OpenSim"\OpenSim 3.01\bin).

It sounds like this may not be in your system path. If not, add the above path to variable list.

David

Hi KT, Regarding the java error I am not totally sure. I believe though that you must tick the scale model box for the model adjuster to run. I think this is due to some requirements in the cost function that the adjust markers uses. The Osim developers would know why. Its not a problem though, you ...

Hi, You are describing a common problem. Scaling is performed by applying a scale factor to the body by dimension or uniformly across dimensions. You could determine the virtual marker positions in your generic/unscaled model, and compare this with your experimentally measured inter-ASIS to determin...

Hi Shaun,

That is also how my code runs. Some the API execution commands (maybe all not sure) require the path to the directory as input argument. While the write location doesn't seem modifiable, so it probably uses the cd as default.

Glad its working

David

Hi Shaun,

Are you running Windows 7? Are you running Matlab in Administrator mode? I think the permissions might be different between operating systems, not sure though.

David

Hi Shaun, I had a similar issue. I wanted to write the log file for each given operation, rather than overwrite. What I did was (see below example from a scaling operation): % Check for the log file test4linscalelog = dir(fullfile(subjectDir, '*out.log')); % Condition for copying log if ~isempty(tes...

Hi Alice, A range of marker sets are possible, with IK allowing fewer markers than that required in segment based modelling but also permitting redundant marker sets where IK solves an over determined problem. For both scaling and IK, I would say the issue is going to be the fidelity between your vi...

Hi All,

To update:

Success with direct computation of muscle lengths and moment arms, the outputs now match the analyze API exactly.

Thanks very much for the help,

David