Finding the Fiber Length of the current joint config

[baoping xiong]

I have the current joint config,what function of opensim i can used in matlab to get the muscle's the Fiber Length.thank you!

[Thomas Uchida]

The Muscle::getFiberLength() method (https://simtk.org/api_docs/opensim/api_ ... 46468804f4) will return the fiber length corresponding to the specified State:

Code: Select all

fiberLength = myMuscle.getFiberLength(myState);

[baoping xiong]

thank you ！，i am the first time used opensim in matlab,i don't how to put the joint angle to the state.can you tell me how to put the joint angle to the state?

[baoping xiong]

thank you ！，i am the first time used opensim in matlab,i don't how to put the joint angle to the state.can you tell me how to put the joint angle to the state?

[jimmy d]

The doxygen documentation for coordinates is here; https://simtk.org/api_docs/opensim/api_ ... inate.html

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state = model.initSystem()

% Get a reference to a coordinate.
aCoord = model.getCoordinateSet().get(1);

% set value, in radians
aCoord.setValue(state, 2);

[Thomas Uchida]

i am the first time used opensim in matlab

These pages in the Confluence documentation may be helpful (in case you haven't found them yet):
- http://simtk-confluence.stanford.edu:80 ... g+Commands
- http://simtk-confluence.stanford.edu:80 ... ith+Matlab (note the example scripts at the bottom of this page)

[baoping xiong]

thank you,i know it.