Remark on Algorithm 761

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Remark on Algorithm 761: scattered-data surface fitting that has the accuracy of a cubic polynomial

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ACM Transactions on Mathematical Software (TOMS) archive
Volume 26 , Issue 1 (March 2000) table of contents

Pages: 46 - 48

Year of Publication: 2000

ISSN:0098-3500

Authors

Flavia de Tisi	Univ. degli Studi di Milano, Milan, Italy
Alba Valtulina	Univ. degli Studi di Milano, Milan, Italy

Publisher

ACM New York, NY, USA

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ABSTRACT

Several improvements to the estimation of partial derivatives in Algorithm 761 are presented. The problems corrected are (1) in the calculation of the probability weight in subroutine SDPD3P which may result in overflow, (2) in the calculation of final weight in subroutine SDPD3P which may result in overflow, (3) in the computation of a determinant in subroutine SDLEQN which is not necessary, and (4) in the computation of the condition number of a matrix in subroutine SDLEQN which generates very different results for matrices that differ only in row order.

REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	Hiroshi Akima, Algorithm 761; scattered-data surface fitting that has the accuracy of a cubic polynomial, ACM Transactions on Mathematical Software (TOMS), v.22 n.3, p.362-371, Sept. 1996 [doi>10.1145/232826.232856]
	2	Robert J. Renka , Ron Brown, Remark on algorithm 761, ACM Transactions on Mathematical Software (TOMS), v.24 n.4, p.383-385, Dec. 1998 [doi>10.1145/293686.293689]