Figure 6. Percentage of frames error analysis.

Errors are divided into four error classes (err < 2°, 2° < err < 4°, 4° < err < 6°, err > 6°) for absolute errors (A and C), and four error classes (err < 10%, 10% < err < 20%, 20% < err < 40%, err > 40%) for percent errors (B and D). The amount of frames recorded in a specific class, for a specific movement, are reported on the y axis as frequency observed expressed in percentage. All functional movements are represented. Segment angles errors are shown in A and B while joint angle errors are shown in C and D.