Gaussian fitting based FDA for chemometrics

Authors:
Tuomas Kärnä;Amaury Lendasse
Affiliations:
Helsinki University of Technology, Laboratory of Computer and Information Science, Finland;Helsinki University of Technology, Laboratory of Computer and Information Science, Finland
Venue:
IWANN'07 Proceedings of the 9th international work conference on Artificial neural networks
Year:
2007

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Abstract

In Functional Data Analysis (FDA) multivariate data are considered as sampled functions. We propose a non-supervised method for finding a good function basis that is built on the data set. The basis consists of a set of Gaussian kernels that are optimized for an accurate fitting. The proposed methodology is experimented with two spectrometric data sets. The obtained weights are further scaled using a Delta Test (DT) to improve the prediction performance. Least Squares Support Vector Machine (LS-SVM) model is used for estimation.