Linear least squares problems with data over incomplete grids |
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| Authors: | G. Pisinger A. Zimmermann |
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| Affiliation: | (1) Department of Computer Science and Mathematics, University of Passau, Innstrasse 43, 94032 Passau, Germany;(2) FORWISS University of Passau, Innstrasse 43, 94032 Passau, Germany |
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| Abstract: | The paper addresses bivariate surface fitting problems, where data points lie on the vertices of a rectangular grid. Efficient and stable algorithms can be found in the literature to solve such problems. If data values are missing at some grid points, there exists a computational method for finding a least squares spline by fixing appropriate values for the missing data. We extended this technique to arbitrary least squares problems as well as to linear least squares problems with linear equality constraints. Numerical examples are given to show the effectiveness of the technique presented. AMS subject classification (2000) 65D05, 65D07, 65D10, 65F05, 65F20 |
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| Keywords: | least squares surface fitting tensor product splines linear equality constraints |
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