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After RRA, when I plot the normalized fiber length with respect to results(Deg.) and export the data, I find that the difference between the points in the results(Deg) column is not uniform. i.e, there is no uniform difference between the values of the points.

Is there any way to obtain a uniform difference.e,g, a constant difference of 0.001between the values?

Thanks and Regards

How far off 0.001s are the time steps? You can interpolate between times to get the values you need. I noticed in a lot of example RRA output files with OpenSim that the time steps are more or less even, however, since there is a simulation step, it may not be strictly enforced.

A separate point too: Since RRA does not compute muscle controls, the fiber lengths likely will not be correct (since the tendon won't be stretched). Muscle-tendon length as a whole could be estimated too, but likely wouldn't differ from IK by much.