Research Article

Fingerprinting Indoor Positioning Method Based on Kernel Ridge Regression with Feature Reduction

Figure 7

Average positioning error versus the number of RPs of WKNN, LASSO, KRR, and the proposed method. 1/2, 1/3, and 1/4 RPs mean, respectively, a half, a third, and a quarter of the total RPs in the maps.
(a) Map 1
(b) Map 2