Plausibility of Databases and the Relation to Imputation Methods
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- Englisch ausgewählt
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Beschreibung
Produktdetails
Einband
Taschenbuch
Erscheinungsdatum
03.07.2012
Verlag
AV AkademikerverlagSeitenzahl
96
Maße (L/B/H)
22/15/0.7 cm
Gewicht
161 g
Sprache
Englisch
ISBN
978-3-639-43578-8
Revision with unchanged content. The estimation of the plausibility of a set of observations basically depends on the main structure which stands behind these data. Observations which fit into this estimated structure seem more plausible, than observations with large distance to such structure estimates. For representing the structure of a data set, here principal components are used. Since single observations which do not follow the main structure of a data set (outliers) should not influence such estimations, robust methods are considered primarily in this context. The estimation of missing values is based on principal component analysis as well. Iteratively principal components are estimated, and observations are projected onto them until convergence of this process. In this context existing algorithms have been improved concerning the quality of imputation and runtime behavior. In particular this improvement focuses on the projection methods which are used to project observations containing missings onto principal components.
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