Ítem
| Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada | |
| Hijazi, R. | |
| 13 maig 2011 | |
| Zeros in compositional data are classified into “rounded” zeros and “essential” zeros. The rounded zero corresponds to a small proportion or below detection limit value while the essential zero is an indication of the complete absence of the component in the composition. Several parametric and non-parametric imputation techniques have been proposed to replace rounded zeros and model the essential zeros under logratio model. In this paper, a new method based on EM algorithm is proposed for replacing rounded zeros. The proposed method is illustrated using simulated data | |
| application/pdf | |
| http://hdl.handle.net/10256/13650 | |
| eng | |
| Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada | |
| CoDaWork 2011. The 4th International Workshop on Compositional Data Analysis | |
| Tots els drets reservats | |
|
Estadística matemàtica -- Congressos
Mathematical statistics -- Congresses Anàlisi multivariable -- Congressos Mathematical statistics -- Congresses |
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| An EM-Algorithm Based Method to Deal with Rounded Zeros in Compositional Data under Dirichlet Models | |
| info:eu-repo/semantics/conferenceObject | |
| DUGiDocs |
