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https://hdl.handle.net/2440/36886
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dc.contributor.author | Pardo-Iguzquiza, E. | - |
dc.contributor.author | Dowd, P. | - |
dc.date.issued | 2001 | - |
dc.identifier.citation | Computers and Geosciences, 2001; 27(5):549-561 | - |
dc.identifier.issn | 0098-3004 | - |
dc.identifier.uri | http://hdl.handle.net/2440/36886 | - |
dc.description | Copyright © 2001 Published by Elsevier Science | - |
dc.description.abstract | VARIOG2D is a Fortran-77 program that provides four basic operations for semi-variogram analysis: inference of the experimental semi-variogram, estimation of the variance–covariance matrix of the experimental semi-variogram, fitting a theoretical model by non-linear generalised least squares and estimation of the uncertainty of the semi-variogram model parameters. Although software for estimating the semi-variogram by the method of moments is widely available, there is no generally available software for assessing the uncertainty of the experimental semi-variogram. VARIOG2D provides the exact variance–covariance matrix of the experimental semi-variogram, which can be used for attaching standard errors to the experimental semi-variogram, for assessing the correlation between the different semi-variogram lag estimates and for fitting a model by generalised least squares. In addition, the generalised least-squares fitting procedure allows an evaluation of the uncertainty of the experimental semi-variogram and of the semi-variogram model parameters. A case study shows the application of the variance–covariance matrix of the experimental semi-variogram and the performance and capabilities of the program. | - |
dc.description.statementofresponsibility | Eulogio Pardo-Igúzquiza and Peter A. Dowd | - |
dc.description.uri | http://www.sciencedirect.com/science/journal/00983004 | - |
dc.language.iso | en | - |
dc.publisher | Pergamon-Elsevier Science Ltd | - |
dc.source.uri | http://dx.doi.org/10.1016/s0098-3004(00)00165-5 | - |
dc.subject | Geostatistics | - |
dc.subject | Variance–covariance matrix | - |
dc.subject | Standard error | - |
dc.subject | Generalised least squares | - |
dc.subject | Soil science | - |
dc.title | VARIOG2D: a computer program for estimating the semi-variogram and its uncertainty | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/S0098-3004(00)00165-5 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Dowd, P. [0000-0002-6743-5119] | - |
Appears in Collections: | Aurora harvest Civil and Environmental Engineering publications |
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