The only problem of the zip file is this line:

at.setForceSetFiles(ArrayStr(forceSetFileName));

The input of setForceSetFiles should be an ArrayStr. However, the way it was constructed is wrong. That line should be replaced with this:

A=ArrayStr();
A.set(0,forceSetFileName);
at.setForceSetFiles(A);

Hello Mojtaba, It's probably because you didn't change the directory path in the xml file setup or you put a wrong directory in the first lines of the main file. Please open External_Load.xml. Then, in the <datafile> section, copy and paste the right directory in your computer. Attached is the pic o...

Hi, I just downloaded again and run it and it works. I guess the folder that you put the setup files is not correct or you have not changed the folder names in the main.m code. I just downloaded my codes in my laptop desktop and changed the directories as follows: main.PNG As it says % PointKinemati...

Hello,
This code was written for OpenSim 3.3. I believe it should also work for OpenSim 4, unless many commands have been changed. Would you please explain more about the model and the error you get that I might help you with.

Hello All, I am working with OpenSim API through MATLAB. If A is my storage, I use this command to get states vector @ time t: B=A.getStateVector(t-1); C=B.getData(); C is an arraydouble variable. I can access to the element m by this command: C.getitem(m-1) However, I don't want to use a for loop t...

Hi Dimitar, Thank you very much for your response and the python code. Is there anyway to get the states of the system as a MATLAB matrix during the simulation? I mean, e.g. for Inverse Dynamic, I can get a matrix (number of time instants * number of coordinates) of generalized forces. Right now, wh...

Hi, I can run different analysis tools (i.e. inverse dynamic, point kinematic, muscle analysis, etc.) through MATLAB by API. However, to use the generated results in MATLAB, I have to open the results from above analysis tools in MATLAB using importdata function. For example, A=importdata(PointKinem...

Hi All, I have two questions and appreciate if someone could help me with them. Based on confluence's documents, for static optimization procedure in OpenSim, we could consider force-length-velocity properties of muscles. https://simtk-confluence.stanford.edu/display/OpenSim/How+Static+Optimization+...

Hi Tom,

Thank you for your response. I see your point.

Dear sir/Madam, I have my inverse kinematic results (.mot) and I want to compute muscle moment arms around each coordinate in each time step using MATLAB. As I understood, Muscle.computeMomentArm(State , Coordinate) is a function that can do this for each muscle and the inputs of this class are a st...