Page Comparison

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1. Assess the quality of the Inverse Dynamics results. In the ID results folder, open the file ending in “summary.txt”.
   1. What are the average residual force and torque?
   2. How do these values compare to the residuals after RRA?
   3. Look at all 6 residual values over the trial by opening the file ending in “id.pdf” provided in the ID results folder. How do these values compare with the residuals after RRA?
2. Investigate some of the changes that were made by the tool to reduce residuals. Similar to RRA, the inertial parameters of bodies and kinematics can be changed to reduce residuals.
   1. In the top folder of the downloaded results, open README.txt. How does the total mass of the model compare to the mass of the subject that was used as an input to the tool?
   2. Which bodies had some of the largest changes, both as percentage changes and absolute changes. Are these changes changes reasonable? Why or why not?
3. Assess the quality of your ID results .by comparing your ID results from those obtained in the original paper (Rajagopal et al., 2016). Plot your results for the three sagittal plane coordinates (hip_flexion, knee_angle, and ankle_angle) through either: 1) plotting in the GUI, or 2) opening the file ending in “id.pdf” provided in the ID results folder.
    
   1. How well do your results match with the original work? Some aspects to consider include the timing of peaks, the relative magnitude of the different joint moments, and the absolute magnitude of the different joint moments.Compare your ID results from those obtained in the original paper (Rajagopal et al., 2016). 
   2. Are these results differences surprising given that the processing steps were performed differently?Plot your results for the three sagittal plane coordinates (hip_flexion, knee_angle, and ankle_angle) through either: 1) plotting in the GUI, or 2) opening the file ending in “id.pdf” provided in the ID results folder.

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