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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국자료분석학회 Journal of The Korean Data Analysis Society Journal of The Korean Data Analysis Society 제8권 제4호
- 발행연도
- 2006.1
- 수록면
- 1,265 - 1,279 (15page)
이용수
초록· 키워드
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In spatial statistics, prediction method the value at a specified location with data of a single variable is called 'kriging'. It is performed through three stages of (1) estimating variograms, (2) fitting the variogram model to the estimated variograms, and (3) predicting the value at a specified location using the resulting fitted model. It is naturally extended to 'cokriging', which is performed in the similar three stages when multivariate data are available. In case additional observations of one and more covariables are available, cokriging may lead to increased precision of the prediction. Recently, sensitivity analysis for spatial data takes a growing interest in spatial statistics. An aim of the present article is to propose a method to detect influential observations in the second stage of 'cokriging'. For the present article, we derive influence functions, and then sensitivity analysis is performed using the derived influence functions. The Euclidean norm of the influence functions is used as methods to detect influential observations. A real numerical example is analyzed to show the validity or usefulness of the proposed influence functions.
목차
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참고문헌 (15)
참고문헌 신청
A / 1980 / Robust estimation of the variogram : 115 ~ 125
A / 1991 / Statistics for Spatial Data
Basu, S / 1997 / The effects of influential observations on sample semivariograms 2 (4) : 490 ~ 512
Cho, J. Y / 2001 / Comparative Study on the Prediction of Geo-Statistics with General Statistics 3 (1) : 41 ~ 49
Choi, S. B / 2000 / Sensitivity Analysis in Auto- and Cross- Variogram Estimation 2 (1) : 91 ~ 107
A / 1991 / Statistics for Spatial Data
Basu, S / 1997 / The effects of influential observations on sample semivariograms 2 (4) : 490 ~ 512
Cho, J. Y / 2001 / Comparative Study on the Prediction of Geo-Statistics with General Statistics 3 (1) : 41 ~ 49
Choi, S. B / 2000 / Sensitivity Analysis in Auto- and Cross- Variogram Estimation 2 (1) : 91 ~ 107
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