Optimization in Locally Weighted Regression
- 3 September 1998
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 70 (19) , 4206-4211
- https://doi.org/10.1021/ac980208r
Abstract
The application of locally weighted regression (LWR) to nonlinear calibration problems and strongly clustered calibration data often yields more reliable predictions than global linear calibration models. This study compares the performance of LWR that uses PCR and PLS regression, the Euclidean and Mahalanobis distance as a distance measure, and the uniform and cubic weighting of calibration objects in local models. Recommendations are given on how to apply LWR to near-infrared data sets without spending too much time in the optimization phase.Keywords
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