June 2009
Beginner to intermediate
428 pages
9h 48m
German
Content preview from Data Mining mit Microsoft SQL Server
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15.1. Validierung nach der HoldOut-Methode
Dieser Abschnitt beschreibt, wie man die in Kapitel 4 beschriebene Validierung nach der HoldOut-Methode in SQL Server Analysis Services durchführen kann.
15.1.1. Testmenge zurückhalten
SQL Server Analysis Services 2008 bieten im Zuge des Erstellens einer Miningstruktur die Möglichkeit, Daten für eine Validierung nach der HoldOut-Methode zurückzuhalten (siehe Kapitel 13). Die Auswahl dieser Daten erfolgt nach dem Zufallsprinzip. Nach dem Erstellen können diese Eigenschaften über das Eigenschaftenfenster der Miningstruktur abgeändert werden (siehe Abbildung 15.1). Die Eigenschaft HoldOutMaxPercent legt fest, welcher in Prozent ausgedrückter Anteil der zur Verfügung stehenden Daten zum Testen zurückgehalten ...
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