PiecewiseLinearFunction in MatLab

[Robert Steidl]

Hello, again me, and again with a similar issue,

i want to create a linear function for the force in MatLab - the c++ code looks so:

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PiecewiseLinearFunction *forceX = new PiecewiseLinearFunction(2, time, fXofT);

In MatLab i can acces to the constructor like:

Force = PieceWiseLinearFunction();

but how can i add the parameters time and fXofT in MatLab??

[Thomas Uchida]

Have you tried addPoint()? There's a C++ example that uses addPoint() here: https://github.com/opensim-org/opensim- ... e.cpp#L212; here's the documentation: https://simtk.org/api_docs/opensim/api_ ... ction.html.

[Robert Steidl]

Thank you,

thats a good point - for my understanding, if I have the timepoints at 0 and 2 and the corresponding force at 0 and 15 my code should look like:

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Force = PiecewiseLinearFunction();
Force.addPoint(0, 0);
Force.addPoint(2, 15);

Am I right?

[Thomas Uchida]

Yes, that code looks correct. I recommend getting into the habit of running tests using simple models and verifying that the answers are what you expect before trying to tackle more complex problems.