. Author manuscript; available in PMC: 2011 Dec 1.

Published in final edited form as: Comput Methods Biomech Biomed Engin. 2010 Dec;13(6):749–763. doi: 10.1080/10255840903580033

Table 2.

Comparison between the given principal direction and outcomes from RT and LF algorithms

True Rotation Degree θ₀(°)	LF result θ₁ (°)	LF Accuracy (%)	RT result θ₂ (°)	RT Accuracy (%)
30	30.11	0.4	30	0.0
60	59.9	−0.2	60	0.0
90	94.2	4.7	92	2.2
120	120.51	0.4	120	0.0
150	150.31	0.2	150	0.0
180	180.17	0.1	180	0.0

Column one is the rotated degrees of Figure 4 from the prescribed principal direction. Columns two and four are, respectively, the principal directions computed by the LF and RT algorithms. The accuracies (θ₁−θ₀)/θ₀ are listed in columns three and five as percents.