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Local polynomials for data detrending and interpolation in the presence of barriers

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Abstract

We discuss features of local polynomial interpolation (LPI), focusing on the problem with unstable solutions of the LPI system of linear equations. We develop a new diagnostic based on condition number values. Also, a variant of Tikhonov regularization is proposed, which allows the production of continuous predictions and prediction standard errors nearly everywhere in the data domain. This variant of LPI can be used in the presence of barriers defined by polylines. LPI model is a good candidate for real time automatic mapping of the data regularly collected from the environmental monitoring networks. We illustrate the LPI usage with both simulated data and real data.

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Authors and Affiliations

  1. Environmental Systems Research Institute, 380 New York St, Redlands, CA, 92373, USA

    Alexander Gribov & Konstantin Krivoruchko

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  1. Alexander Gribov
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  2. Konstantin Krivoruchko
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Correspondence to Konstantin Krivoruchko.

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Gribov, A., Krivoruchko, K. Local polynomials for data detrending and interpolation in the presence of barriers. Stoch Environ Res Risk Assess 25, 1057–1063 (2011). https://doi.org/10.1007/s00477-011-0488-2

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